Date   

Cricketeer Member Number 003 is no longer available

dekle@...
 

WOO HOO BABY !!!!!!!

A few minutes after 6 a.m. this morning I had a great QSO on my Cricket with Dale - WN0WWY.
The band was exceptionally quiet and his 559 QRP signal was the only thing in my passband for a change.
We chatted for 10 minutes until QSB started.

The QSO with Dale was the 10th (unique callsign) QSO on my Cricket so I requested membership to the Cricket Society.
Man, that certificate is a beauty and it's going on the wall !!!

That little radio just amazes me.

73
Bill
KV6Z







Re: Obituary(s) To A Filter Cap And A 6X4 Rectifier Tube

Sam Neal
 

Hello Steve,

Thanks for the condolences. The replacement filter cap is working well at
about 75VDC below it's maximum rating. the replacement is running cool being
in the transmit mode all the time - or off. I will check ir again (
temperature ) before putting it back on the operating position. Right now it
is still on a workbench.

I buy in bulk a flea=markets and install one in every rig when I first put it
on the air. I try to fuse it just above the " blowing " point, installed in
one of the 110 VAC primary power leads going to the power transformer.


the fuse holder that permanently mounts on the chassis, with a little cap you
unscrew to replace the bad fuse if the type I like to use. Quick and easy and
you don't have to take the cabinet/cover off to get to the spent fuse.

On some of the older transmitters like the classic Heath-Kits - AT-1 and DX-20
have thicker steel chassis and then it is easier to mount a " one bolt holds
it in place ", but it makes replacing the fuse more difficult.

Steve, basically I am a 75 year old teen-ager re-living my mis-spent youth
buying these 60 + year old radios I couldn't afford when I was a kid and using
them today.

I also have other radios running full time, a pair of Iom 756PROIIs and an
Icom 765PROIII I just bought from the estate of my lifelong friend which
reminds me I need to " thin our the herd somewhat here.

At Christmas time, one of the big market items are fruit cakes - and their
main good point are the cans they come in, which I use to store parts/wire/and
fuses in. I got tired if buying expensive fuses one at a time, and started
buying assortments in bulk at flea-markets, and now I have a fruit-cake can
full of almost every possible fuse I might need.

Sorry for the long outpouring on this subject. It is raining cats and dogs
here in east Texas rifght now and I am trapped in my detached shack - not a
bad way to send the day.

Keep the operating Voltages well below the ratings stamped on them!

73,

Sam Neal N5AF
Celebrating 60 Years In Amateur Radio

And the filter cap is still running cool to the touch.

------ Original Message ------
Received: Mon, 05 Jun 2017 04:01:23 AM CDT
From: "'Steve Ireland' vk6vz@arach.net.au [4sqrp]" <4sqrp@yahoogroups.com>
To: "Sam Neal" <n5af@usa.net>, <4sqrp@yahoogroups.com>
Subject: Re: [4sqrp] Obituary(s) To A Filter Cap And A 6X4 Rectifier Tube

G’day Sam

Your email made me laugh aloud – although not at the tragedy of course.

I may be laughing on the other side of my face soon, having just replaced the
multiple capacitor-in-a-can in an old Drake 2-B with four Chinese 450V
electrolytics. The rectifier whose bumps they are smoothing out just happens
to be a JAN 6X4. Maybe I should think about a fuse?.. ;-)

Have a great day, mate.

Vy 73

Steve, VK6VZ



From: mailto:4sqrp@yahoogroups.com
Sent: Sunday, May 28, 2017 4:13 AM
To: 4sqrp@yahoogroups.com ; amecoac1@yahoogroups.com ; GQRP@yahoogroups.com ;
AQRP@yahoogroups.com ; regenrx@yahoogroups.com ; Robert Melton ; Sam Neal
Subject: [4sqrp] Obituary(s) To A Filter Cap And A 6X4 Rectifier Tube


Hello,

I sadly report the passing of two QRP radio transmitter components.

( #1 ) Passing ( Suddenly! ) of a 22 mFd/450 Volts DC Filter capacitor.

Born approximately 2007 in China ( The People's Republic There-of )

Passed ( suddenly ) just before the 4 States QRP Group Net, 0130 Z - 7122 kHz
-
24 May, 2017 at 01:15:05Z

Born in People's Republic of China to operate continually at 450 VDC.
Passed suddenly and in a spectacular manor while operating at approximately
380 VDC

We also sadly report the associated passing of two 1 Ampere fuses and one 6X5
Tube.

__________________________________________________________

( #2 ) Suddenly, 01:15:06 Z one 6X5GT/G CHS/Jan rectifier tube.

6X5/GT/G/JAN/CHS served proudly during the World War 2 conflict assigned to
the United States Navy.
Two innocent 1 Ampere fuses lost their lives as a result of the above
incident.

Services will be This coming Wednesday by the P&H Garbage Pick-up Service
Company
Pall-bearers will be Cooter and Bubba.

Internment will be shortly there-afterwards at The Liberty County Texas
Landfill

=========================================================================================
=========================================================================================

This is the first failure I have had with these small sized fiter caps. I
suggest operating these imports will below heir rated Voltage limits. The
above components were in the built-in power supply of a clone-kit of an Ameco
AC-1, with a Ken-Rad 6V6 tube as a crystal oscillator.

The transmitter was not being used when the filter cap failed, just minding
it's own business, awaiting net time.

The current rush took the 6X5/G/GT with it, and it's rolling off the desk top
and playing Humpty Dumpty didn't help it any at all. So far, no problems with
the replacement 22 mFd. 450 VDC cap.

All kidding aside, have any of you had problems with these type capacitors,
operating well below their operating Voltage, failing? The value and Voltage
ratings are well marked, but no manufacturer's info is shown. I either bought
them in small lots off of E-Bay purchases, or the filter cap was supplied
with
the kit - I forget.

Due to failure with 50+ year old paper filter caps in older boat anchor rigs,
I routinely replace the filter caps and also add a fuse before ever
transmitting the first dot with them. I had hoped that operating well below
it's Voltage rating would help, but it didn't.

Any comments on similar incidents would be appreciated.

73,

Sam Neal N5AF

Celebrating 60 Years In Amateur Radio
----------------------------------------------------------


Re: Obituary(s) To A Filter Cap And A 6X4 Rectifier Tube

Steve Ireland <vk6vz@...>
 

G’day Sam
 
Your email made me laugh aloud – although not at the tragedy of course.
 
I may be laughing on the other side of my face soon, having just replaced the multiple capacitor-in-a-can in an old Drake 2-B with four Chinese 450V electrolytics. The rectifier whose bumps they are smoothing out just happens to be a JAN 6X4. Maybe I should think about a fuse?.. ;-)
 
Have a great day, mate.
 
Vy 73
 
Steve, VK6VZ
 
 
 

Sent: Sunday, May 28, 2017 4:13 AM
Subject: [4sqrp] Obituary(s) To A Filter Cap And A 6X4 Rectifier Tube
 
 

Hello,

I sadly report the passing of two QRP radio transmitter components.

( #1 ) Passing ( Suddenly! ) of a 22 mFd/450 Volts DC Filter capacitor.

Born approximately 2007 in China ( The People's Republic There-of )

Passed ( suddenly ) just before the 4 States QRP Group Net, 0130 Z - 7122 kHz
-
24 May, 2017 at 01:15:05Z

Born in People's Republic of China to operate continually at 450 VDC.
Passed suddenly and in a spectacular manor while operating at approximately
380 VDC

We also sadly report the associated passing of two 1 Ampere fuses and one 6X5
Tube.

__________________________________________________________

( #2 ) Suddenly, 01:15:06 Z one 6X5GT/G CHS/Jan rectifier tube.

6X5/GT/G/JAN/CHS served proudly during the World War 2 conflict assigned to
the United States Navy.
Two innocent 1 Ampere fuses lost their lives as a result of the above
incident.

Services will be This coming Wednesday by the P&H Garbage Pick-up Service
Company
Pall-bearers will be Cooter and Bubba.

Internment will be shortly there-afterwards at The Liberty County Texas
Landfill

=========================================================================================
=========================================================================================

This is the first failure I have had with these small sized fiter caps. I
suggest operating these imports will below heir rated Voltage limits. The
above components were in the built-in power supply of a clone-kit of an Ameco
AC-1, with a Ken-Rad 6V6 tube as a crystal oscillator.

The transmitter was not being used when the filter cap failed, just minding
it's own business, awaiting net time.

The current rush took the 6X5/G/GT with it, and it's rolling off the desk top
and playing Humpty Dumpty didn't help it any at all. So far, no problems with
the replacement 22 mFd. 450 VDC cap.

All kidding aside, have any of you had problems with these type capacitors,
operating well below their operating Voltage, failing? The value and Voltage
ratings are well marked, but no manufacturer's info is shown. I either bought
them in small lots off of E-Bay purchases, or the filter cap was supplied with
the kit - I forget.

Due to failure with 50+ year old paper filter caps in older boat anchor rigs,
I routinely replace the filter caps and also add a fuse before ever
transmitting the first dot with them. I had hoped that operating well below
it's Voltage rating would help, but it didn't.

Any comments on similar incidents would be appreciated.

73,

Sam Neal N5AF

Celebrating 60 Years In Amateur Radio
----------------------------------------------------------


Virus-free. www.avast.com


Analog Meters

davemrtn
 

I have a few 'old' Analog Meters I want to get to somebody that can use one.

My nostalgic tendencies won't let me chunk them in the trash, besides they are in good condition and still usable.

Here's the list of what I have:

Calectro 100mA D.C. in original box

Calectro 50uA D.C. in original box

Triplet 500 mA. D.C.

Triplet 50 Volts D.C. (1000 ohms/volt)

Triplet 300 Volts A.C.

Westinghouse 500 mA. D.C.

Westinghouse 500 Volts D.C.

Calectro 10 A. D.C.

Calectro 30 Volt D.C.

Simpson 300 Volts A.C. (Sealed unit)

Simpson 100 uA. D.C. horiz. edge meter

Weston 50 mA. D.C.

Weston 10 A. D.C.

Weston 100 mA.D.C.

If you are interested in any or all, I can send you a photograph.

I have no idea of their $$$ value, to me it is pretty low, but to someone needing one for a restoration or purpose, they might be of considerable value.

I don't want to make a killing off of any of them, I would just like to get them to someone that can use them and only be given a modest compensation, plus shipping cost.

--
David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Everybody complains about CO2, but nobody complains about all
the trees cut down to build Highways and Cities.
Recycle, Reuse, Re-purpose, Repair


Re: For Sale

R Weeks <neotoxo54@...>
 

DOOH!


Sent from my iPhone

On Jun 2, 2017, at 19:44, David Martin davemrtn@... [4sqrp] <4sqrp@...> wrote:

 

Take what from who ?

Who is supposed to e-mail you ????

David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Everybody complains about CO2, but nobody complains about all
the trees cut down to build Highways and Cities.
Recycle, Reuse, Re-purpose, Repair
On 6/2/2017 19:20, cpa599@... [4sqrp] wrote:
 

I'll take it.

Please email me.



Re: For Sale

davemrtn
 

Take what from who ?

Who is supposed to e-mail you ????

David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Everybody complains about CO2, but nobody complains about all
the trees cut down to build Highways and Cities.
Recycle, Reuse, Re-purpose, Repair

On 6/2/2017 19:20, cpa599@... [4sqrp] wrote:
 

I'll take it.

Please email me.



Re: For Sale

cpa599@...
 

I'll take it.

Please email me.


For Sale

bobby rolph
 

I would like to sell my Bayou Jumper. It is already built and working. It is the first version and has the sidetone board installed. It is the radio only and does not include the wooden box. I am asking $50 for it. if interested just email me at rolph981@.... Thanks  72/3

Bobby



Re: I don't need them anymore, well I don't think I do...

Bill Cromwell
 

Hi David,

Unless archeologists evolve over the next few thousand years those parts will become "religious artifacts" - perhaps used in our human sacrifice rituals.

73,

Bill KU8H

On 06/01/2017 01:08 PM, David Martin davemrtn@centurytel.net [4sqrp] wrote:


If nobody wants them, then I guess I will donate them to the local museum of other unwanted items (landfill) !!

I wonder if archeologists would know what they were used for a 1000 years from now when they get unearthed ??


--
bark less - wag more


I don't need them anymore, well I don't think I do...

davemrtn
 

I have 2 each - 4 pin 12 volt vibrators, 1 standard electro-mechanical and 1 solid state.

The electro-mechanical one came from  a CB Shop that used to be here and the owner marked it as 'good'.  The solid state one I purchased many years ago and I don't remember it's status.  Since I didn't throw it away, there must have been a good reason for keeping it all this time.

If anybody wants them just pay shipping of your choice.

If nobody wants them, then I guess I will donate them to the local museum of other unwanted items (landfill) !!

I wonder if archeologists would know what they were used for a 1000 years from now when they get unearthed ??


--
David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Everybody complains about CO2, but nobody complains about all
the trees cut down to build Highways and Cities.
Recycle, Reuse, Re-purpose, Repair


Tonight's 40m net

Wayne Dillon
 

Boomers are still moving through - gonna pull all the plugs.
Blessings all
Wayne - NQ0RP

--
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - NQ0RP

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 
NAQCC MWN NCS
NAQCC Net manager
NAQCC # 0759
Membership Chairman - 4SQRP Group
4SQRP 40m NCS
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-11504
QRP-ARCI #11505
SKCC #1155T
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686
Zombie# 1186


Tonight's 40m net

Wayne Dillon
 

Got boomers at the present time, may clear by 19:30 (CDT) I'll post here and on QRPSpots either way.
Blessings all
Wayne - NQ0RP

--
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - NQ0RP

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 
NAQCC MWN NCS
NAQCC Net manager
NAQCC # 0759
Membership Chairman - 4SQRP Group
4SQRP 40m NCS
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-11504
QRP-ARCI #11505
SKCC #1155T
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686
Zombie# 1186


Re: Cricket VFO

Jim Sheldon
 

Hi Terry (and all other interested parties).  I had tried driving the Cricket with a DDS VFO (N3ZI DDS) that works somewhat with the Bayou Jumper but I was driving the Cricket through the crystal input and doing it that way, it did NOT work.  It would transmit okay, but no band noise was heard and the receiver was pretty deaf so I abandoned that research at the time.

Not seeing the forest for the trees, I never tried removing C8 and driving Q2's base directly so when I saw Terrys mention of it this morning, I quickly removed C8 and ran a micro coax from the C8 hole closest to Q2 with the coax ground going to ground at the bottom of R3.  With the DDS I'm using, you can set the RIT to whatever receive offset you want and (through a keying adapter) when you key the rig, that offset is removed and you get TX on the frequency shown in the DDS display.  This allows for applications like the Cricket where you need the offset to hear a station that's exactly zero beat (or very close) with your TX signal.

My results were encouraging.  I set the DDS output to MAX which in this case is roughly 5 volts peak to peak and I was pleasantly surprised to hear 80 meter band noise in the headphones.  There are birdies caused by mixing products of local garbage signals from my computer power supply with the DDS signal, but I put my calibrated signal generator (-73 dBm output) through a step attenuator to the ant input of the Cricket.  It doesn't meet the stated -110 dBm figure for MDS but I got a measured -118.5 dBm for a readable signal and I'm not 100 percent sure of the accuacy of my test equipment right now.  It IS usable and if band conditions were to be decent, one could probably get decent range out of it.  Also, the 5V P-P drive to Q2 produces .98 watts into a 50 ohm dummy and that checks out as well into a 1:1 SWR on the antenna as well.  Considering the cost of the DDS though ($80 shipped) and the parts to build up a buffer to get the 5V P-P out of 200mV along with a shielded metal case to put it in, you have over 1.5 times the cost of the Cricket in the first place.  

If I make it permanent, I will put an RCA connector (maybe an SMA since I have a few) on the Cricket's circuit board and rig a jumper assembly to switch the input of Q2 between the DDS and C8 from the on-board crystal oscillator.  

I need to play with a few 2N7000 and BS170 transistors @ Q2 and see if the mixing performance can be improved to give a tad better RX sensitivity. 

The answer to Terry's question is that it's now been tried and at least works.  Whether or not anyone winds up satisfied with the RX sensitivity or finds a way to improve it remains to be seen.  IMO it IS worth the try though.

Jim, W0EB

------ Original Message ------
From: "WA0ITP wa0itp@... [4sqrp]" <4sqrp@...>
To: "4sqrp@..." <4sqrp@...>
Sent: 5/31/2017 8:54:42 AM
Subject: [4sqrp] Cricket VFO

Wondering if anyone has tried driving the Cricket with a VFO.  Pulling C8 and driving Q2 directly with 3 to 4 Vpp might work. Would need to devise a way to get the offset tho.

Just thinking out loud, the circuit begs for experimentation.
--
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com


Re: Cricket VFO

Wayne Dillon
 

Might be interesting to try that with an Arduino DDS?
Wayne - NQ0RP

On Wed, May 31, 2017 at 8:54 AM, WA0ITP wa0itp@... [4sqrp] <4sqrp@...> wrote:
 

Wondering if anyone has tried driving the Cricket with a VFO.  Pulling C8 and driving Q2 directly with 3 to 4 Vpp might work. Would need to devise a way to get the offset tho.

Just thinking out loud, the circuit begs for experimentation.

--
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com




--
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - NQ0RP

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 
NAQCC MWN NCS
NAQCC Net manager
NAQCC # 0759
Membership Chairman - 4SQRP Group
4SQRP 40m NCS
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-11504
QRP-ARCI #11505
SKCC #1155T
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686
Zombie# 1186


Cricket VFO

WA0ITP
 

Wondering if anyone has tried driving the Cricket with a VFO.  Pulling C8 and driving Q2 directly with 3 to 4 Vpp might work. Would need to devise a way to get the offset tho.

Just thinking out loud, the circuit begs for experimentation.
-- 
72 WAØITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com


Test Equipment and Station Gear from the Estate of Jerry, W5JH

John Stevens (K5JS)
 

The following is a partial listing of what is available from the estate of Jerry, W5JH.  All equipment is represented correctly to the best of my knowledge. All equipment is in very good condition and was in frequent use in a Non-smoking environment. It was well maintained and not abused. More items will be released in separate lists as I am able to go through them. Waiting in the wings are an ICOM-R70 receiver and refurbished SB-200.

Please reply directly off list and reference W5JH in the subject line to minimize the chance of your reply being overlooked. All manuals and accessories that are associated with each item will be included if I am able to locate and identify them all. Chances are good since the area is not excessively large nor cluttered.

Original boxes will be used if available. Prices are less shipping. Pictures of most gear can be seen at <https://www.qrz.com/db/w5jh>. I have additional photos upon request.

If you are interested in building a fully equipped test bench, this list is for you... It's ALL here. Jerry was very particular about the test equipment on his bench. The HP8640B Signal Generator and Fluke Digital Multimeter in the photos are already spoken for.

Wavetek Model 164 30 MHz Sweep/Function Generator. Commercial laboratory quality. Extremely versatile.    $275

Tektronix 2213 Dual Channel 60 MHz Oscilloscope $!00.

OWON DS7102V dual channel Storage Oscilloscope. Color display. Records data from each channel   Like New  $350

Rigol Spectrum Analyzer DSA815-TG (9kHz - 1.5GHz) with Tracking Generator    Like New   $1100

Kenwood TS-590s Transceiver.  LIke New $825

Dentron Clipperton-L Amplifier.  Very clean with tubes. $600

MFJ-962 Versa Tuner III 1.5 KW Tuner    $150

LP-100A Digital Vector RF Wattmeter w/optional dual coupler. Like New $425
More info at <http://www.telepostinc.com/lp100.html#P>

AADE DFD4 Frequency Counter  $35

AADE LC Meter  $85

LDG Z100 Auto Tuner  $90

So here we go...

73 John  K5JS


Re: testing

John Raynsford
 

Oh no. Ya'll do " pop quizz " here on this forum ?
During the geomagnetic storms and aurora displays
is when the weird stuff happens up north hr.




On Monday, May 29, 2017 11:50 AM, "'dekle' dekle@... [4sqrp]" <4sqrp@...> wrote:


 

You should at least give us some time to study.
And the dog ate my homework.
 
Bill
KV6Z
 
 
----- Original Message -----
Sent: Monday, May 29, 2017 11:19 AM
Subject: [4sqrp] testing

 
testing


--

 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - NQ0RP

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17

 
NAQCC MWN NCS
NAQCC Net manager
NAQCC # 0759
Membership Chairman - 4SQRP Group
4SQRP 40m NCS
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-11504
QRP-ARCI #11505
SKCC #1155T
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686
Zombie# 1186

altVirus-free. www.avast.com



Re: AADE LC meter

KD4OBQ
 


Re: testing

dekle <dekle@...>
 


You should at least give us some time to study.
And the dog ate my homework.
 
Bill
KV6Z
 
 

----- Original Message -----
Sent: Monday, May 29, 2017 11:19 AM
Subject: [4sqrp] testing

 

testing


--

 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - NQ0RP

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17

 
NAQCC MWN NCS
NAQCC Net manager
NAQCC # 0759
Membership Chairman - 4SQRP Group
4SQRP 40m NCS
4SQRP #95
FISTS 17184
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-11504
QRP-ARCI #11505
SKCC #1155T
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686
Zombie# 1186


Virus-free. www.avast.com


Bayou Jumper with Baby Bunnell Key

Jim Sheldon
 

Here's how I mounted the Bunnell model 6B ("Baby Key") on my Rev A
version of the Bayou Jumper in place of the normal built-in key
components that come with the kit. I was lucky enough to obtain 2 of
the Baby Bunnell keys at a reasonable price off eBay several months ago.
They appear to have gotten scarce again though some do show up from
time to time. The 6B was originally mounted in groups of 4 on some
Western Union telegraph test sets so the person doing the testing could
test 4 telegraph circuits nearly simultaneously and send/receive
messages on any of the 4 circuits without having to plug/unplug the key
to do so. As small as these keys are, they are remarkably easy to send
good CW with which attests to the superb quality that Bunnell
manufactured into them in the first place.

First, you have to remove the built-in key components including the
aluminum post used for the fixed contact on the main PC board. Put the
key strap mounting screws back in their holes to cover them for
aesthetic purposes. Temporarily disassemble the Bunnell key's rear
contact (ground) assembly. Be careful you don't lose any parts in the
process as they are not standard size/threads.

Position the key in place with the long insulated contact screw through
the big hole in the BJ's front panel and slightly ream out the contact
hole in the main PC board (not the front panel) ever so slightly so that the contact screw JUST fits. Next, while the key is sitting in the
proper position, mark the panel where the rear (ground) contact screw
needs to go and after removing the Bunnell key from it's position,
carefully drill a hole big enough to fit the ground screw at the place
you just marked. Now, reassemble the key and carefully shorten the rear
screw to protrude about a half inch below the panel when the key is in
place.

Next, using one of the two nuts that are attached to each screw, along
with a large fiber, or plastic washer and a metal washer for support
loosely attach the front of the key to the large knob hole in the top
panel. As you are doing this, take the extra nut from the front screw
and thread it partway up that screw. Now, adding a #6 lockwasher to the
front screw above the main PC board, place it down through the hole
vacated by the aluminum spacer you removed from the main PC board
earlier. Now, tighten the front and rear nuts on the underside of the
front panel board to lock the key in position making sure it's aligned
square with the edge of the panel board to make it look good. Finally,
run the nut you threaded partway up the front screw down against the
lockwasher and top of the PC board. Using the last extra nut and a #6
flat washer on the underside of the PC board, secure the contact screw
to the bottom of the board. Using the nuts on both sides of the PC
board, adjust them so they are tight, make good contact and don't put a
bow in the PC board. You're done and have a nice little "real world"
key on your Bayou Jumper.

Good luck finding and mounting a Bunnell 6B key to the Bayou Jumper.

Jim Sheldon, W0EB

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