Date   

Re: Bayou Jumper First QSO!

Tom Sevart
 

On 12/26/16 16:44, Bob Zolecki bobzolecki@... [4sqrp] wrote:


Curt you are taking a big chance hiding it in the cupboard that's the
first place they will look. 73 de Bob KR9Z
Yes, you must ship it to me to avoid detection.

--
Tom Sevart N2UHC
St. Paul, KS


Bayou Jumper Picture

Curt
 

Well, tried to upload a picture of my Jumper but failed.  Says it uploaded but nothing in my album.

72, Curt KB5JO



Re: Jumper Crystal Strategy...

Curt
 

Added a trimmer to the 7.122 rock, mainly so could adjust transmit to 7.122.  Doubt if folks on a 4s net would be listening for or hear me down on 7.121.

Well recall 1963 with one crystal for 40M.  Call CQ and listen over several kilocycles for an answer from other novices with a different crystal.

72, Curt KB5JO


Re: Jumper Crystal Strategy...

Curt
 

John

I imagine zero beat to ones regen is a challenge,  so indeed someone using a modern rig may need the RIT.  on the regen side, no real need for a RIT, as the passband is wide and the transmit has its own oscillator.  a lot happens when we use a superhet and regen in a qso. 

I could integrate my regen, xtal xmtr and magic box.  this might acquaint me how much I really want a regen based rig!

73 curt


Re: Jumper Crystal Strategy...

John C. Demuth - K8CQA
 

For those not using the "Jumper", most modern rigs have an all-too-often-unused control marked "RIT" ... some may want to consult their manuals to learn the benefits (i.e., more contacts!) which can be gained by using this simple control.

72 de John - K8CQA


Re: Jumper Crystal Strategy...

Curt
 

Curt

I was playing with my wheatstone bridge regen.  I have not measured its passband, but I would guess it may be a kHz or a little more (but I am speculating - read on).  so if the spread of everyone's supplied crystals is a few hundred Hz (likely it is much less), I suspect you may be chasing a rabbit here! 

I imagine that Jim has likely measured the passband of his regen design - obviously it is operator dependent,  I have not ordered yet, but I could lash my WBR with my homebrew transmitter (actually it is nearly the same as that Jim used in his prototype - a tuna tin + a MOSFET PA) to join in, if I am brave enough. 

when I was last playing with the WBR I tuned to a Caribbean DX station running split -- I could hear the signals up 1 kHz calling him also at the same time -- but they were weaker -- possibly mostly due to the propagation skip zone perhaps. 

I am thinking that the Q of all the components in the regen oscillator may determine the sharpness in tuning (which is still rather broad) -- the toroid and the varactor may dominate.  likely it means my WBR may behave similar to the regen in the Bayou jumper. 

meanwhile I have read your emails enough that you, like me, will enjoy nearly any rig placed in front of us to operate.  enjoy!  belated merry Christmas and upcoming new year. 

Curt


Re: Jumper Crystal Strategy...

Cecil Bayona <cecil.bayona@...>
 

It used to be the norm that one would tune around to find another ham on a different frequency other than your own crystal frequency since all the novices were rock bound and often their crystals did not match. Since the receiver can tune around quite a ways it should not be a problem it crystals don't match, it would not hurt to relearn old skills that can come in handy.

On 12/27/2016 8:02 AM, rhulett1@... [4sqrp] wrote:


Just thinking about the strategy for using crystals in the Bayou
Jumper. If we modify the crystals or add capacitors etc, while we can
achieve the marked frequency it will make it more difficult to contact
other Jumpers. Went down this road with the Rockmite, if want to QSO
with other Rockmites, stock is the only way to go because they all pull
the crystal about the same way.

Of course, suppose will mod one 7.122 to allow being right on the 7.122
frequency.

Thoughts?

72, Curt KB5JO


------------------------------------------------------------------------
Posted by: rhulett1@...


Jumper Crystal Strategy...

Curt
 

Just thinking about the strategy for using crystals in the Bayou Jumper.  If we modify the crystals or add capacitors etc, while we can achieve the marked frequency it will make it more difficult to contact other Jumpers.  Went down this road with the Rockmite, if want to QSO with other Rockmites, stock is the only way to go because they all pull the crystal about the same way.

Of course, suppose will mod one 7.122 to allow being right on the 7.122 frequency.

Thoughts?

72, Curt KB5JO



Re: Bayou Jumper First QSO!

Jim Pruitt
 

Jim,  take a look at John Clements crystal page at:
http://kc9on.com/store/parts/hc-49s-crystals/
near the bottom you will see that he is selling FT243 holders for $3.75 each with one of the HC49S crystals inside.  One of the available frequencies is 7.122mhz (or 7.110 or 7.114 from his 40M-B list.  You can get any of his many other  frequencies in those FT243 blank holders.  Also a 3 pack is $10 (and can be 3 different frequencies) plus shipping.  Since there is no danger of over driving those HC49 crystals they should work great in the BJ.  Take a look at Johns home page at http://kc9on.com/  where he says he is working on 6 meter crystals.  John has started stocking a lot of different frequencies that we use and they are quite cheap.

I have no financial interest in this.  I am just a satisfied customer.

Thank you.
Jim Pruitt
WA7DUY

On Mon, Dec 26, 2016 at 4:13 PM, Jim Sheldon w0eb@... [4sqrp] <4sqrp@...> wrote:
 

I picked up a 7.125 FT-243 off eBay for 8 bucks.  I can either load it down with graphite pencil markings on the quartz, or I may try to duplicate an old technique where a screw and knob were attached to vary the pressure on the quartz to lower the frequency a bit.  Depending on how active that particular piece of quartz was, I've seen good ones move 3 or 4 KHz down before they quit oscillating.  If you can find some old Pepsodent tooth powder (not tooth paste) you can use that, a toothbrush and a little water to carefully grind the quartz and raise the frequency a bit.  Never got one to move more than a KHz up though.  Down is much easier.

Used to play with this all the time when I was stationed in Japan back in 1963-1966.  Through the MARS program we had hundreds of FT-243 crystals available.  Now I wish I'd kept a few - LOL

JIM, W0EB

Sent from my iPad

On Dec 26, 2016, at 5:39 PM, Johnny Matlock jomatlock@... [4sqrp] <4sqrp@...> wrote:

Ge Curt, 
I added a small 10-80 pico trim pot in series with my rock, then I could tweak it up a little?
Seemed to work well.
72
Johnny 
On Mon, Dec 26, 2016 at 4:28 PM rhulett1@... [4sqrp] <4sqrp@...> wrote:






























 



















Completed the build about an hour ago, took awhile to find the oscillator on the IC-728, ended up high by about 200 kHz so squeezed the coil, adjusted C30.  Now tuning 7010-7160 which suits me.  Plugged in a 7.050 FT243 crystal, transmits on 7.049. Not having much luck with the spotting procedure, need more practice I suppose.  Used the IC728 to get the receiver close to transmit frequency.  QRL a few times, coast was clear so CQ a few times.  K5ZSI about 130 miles from me answered, gave me a 569 report.

After verifying he wouldn't turn me in to the gestapo, told him was using a "spy radio" at about 2 watts powered with 8xAA cells.  It isn't in the wooden box yet so will hide it from the occupation troops in the cupboard when not in use until can finish the case. 

72, Curt KB5JO












































Re: Bayou Jumper First QSO!

John C. Demuth - K8CQA
 

Re: Grinding crystals.  I have used Bon Ami cleanser (their logo shows a newly-hatched chick with the saying, "Hasn't scratched yet") on a sheet of plate glass for years!  I have easily moved crystals up in frequency by 100 kHz or more.  Count the strokes, applying pressure on opposite corners and moving the crystal blank in a figure-8 pattern on the glass; do 10 to 25 strokes, then change the corners on which you are applying the pressure.  Make sure you apply an equal number of strokes on each pair of corners.  After 50 or 100 total strokes, carefully wash and dry the crystal & try it in the holder again.  That will give you a rough idea of how much you can move it with that many figure-8 strokes.  Be cautious, though; the frequency will move faster as you go higher!  If the crystal stops oscillating, try very carefully grinding the edges (slide the crystal back and forth lengthwise for this) 5 or 10 strokes; this will often restore oscillation.  I began doing this in the late 1950's and it has always given me a great feeling of satisfaction to successfully raise a crystal's frequency.  Peruse literature prior to 1960 for information on grinding crystals; some may have appeared after 1960, but I know I got my basics from literature published prior to 1960.

Cleanliness is critical; wash the crystal carefully and make sure no skin oil gets on either the crystal
or the holder elements.  Sometimes a good washing will make the difference between oscillation and nothing!  A soft toothbrush can help with the washing, but be GENTLE; the crystal blank is very fragile and will not take much pressure when being washed.  A little soap will help with the washing, and LOTS of warm water will help with the rinsing to make sure all the soap is gone.

Good luck!

72 de John - K8CQA


Re: Bayou Jumper..... unusual

David Martin <davemrtn@...>
 

I had considered they were received on tape and cut loose, but I thought it was too consistent to have been cut loose by hand.

Oh well, not important.  Like I said I was just curious.


On 12/26/2016 20:24, larry7hastings7@... [4sqrp] wrote:
 

Hi Dave.  Is one lead longer than the other or is one lead shorter than the other?

They come to me with tape on both leads and are the same length. I use a pair of scissor to 
cut just inside the tape on one side. It makes it easy to pull the resistors, RF chokes and Diodes
 off the other side out with my fingers. Hints one lead is short than the other. 
I call them unbalanced resistors. Kind of like me. 72
Larry


-- 
David Martin - NA1MH - Mountain Home, Ar.
-----------------------------------------


Re: Bayou Jumper..... unusual

David Martin <davemrtn@...>
 

ha ha....  really.

Is the long lead the anode or the cathode ?? hi hi


On 12/26/2016 16:37, Walter - K5EST wrote:
Most of the resistors were from Jameco............they may be polarized resistors........GRIN!!!!!!!!!!
73.......Walter - K5EST

On Mon, Dec 26, 2016 at 2:16 PM, David Martin davemrtn@... [4sqrp] <4sqrp@...> wrote:
 

The resistors supplied with the Bayou Jumper have leads of different
length, one end being shorter than the other.

This is not a problem, just commenting because in all my years I have
never come across resistors that the lead lengths were not the same.

To satisfy my curiosity, I would like to know what vendor these
resistors were purchased from.

--
David Martin - NA1MH - Mountain Home, Ar.
-----------------------------------------



-- 
David Martin - NA1MH - Mountain Home, Ar.
-----------------------------------------


Re: Bayou Jumper..... unusual

Larry Hastings
 

Hi Dave.  Is one lead longer than the other or is one lead shorter than the other?
They come to me with tape on both leads and are the same length. I use a pair of scissor to 
cut just inside the tape on one side. It makes it easy to pull the resistors, RF chokes and Diodes
 off the other side out with my fingers. Hints one lead is short than the other. 
I call them unbalanced resistors. Kind of like me. 72
Larry


Re: Bayou Jumper First QSO!

Jon Jesse
 

Fine contact, Curt.  QSB was bad but you were there.  I hope to start my BJ this week if it's quiet enough around here.  It's killing me just looking at it unbuilt in the box but it's been crazy around here,
72 and thanks,
Jon WS1K


---In 4sqrp@..., <rhulett1@...> wrote :

Just had QSO with WS1K in MA ( 1600 miles ), gave me a 339 on 7.121.  Now I am QRT for awhile, the gestapo may have been tipped off...

72, Curt KB5JO


Re: Bayou Jumper First QSO!

Curt
 

Just had QSO with WS1K in MA ( 1600 miles ), gave me a 339 on 7.121.  Now I am QRT for awhile, the gestapo may have been tipped off...

72, Curt KB5JO


Re: Bayou Jumper First QSO!

Jim Sheldon
 

I picked up a 7.125 FT-243 off eBay for 8 bucks.  I can either load it down with graphite pencil markings on the quartz, or I may try to duplicate an old technique where a screw and knob were attached to vary the pressure on the quartz to lower the frequency a bit.  Depending on how active that particular piece of quartz was, I've seen good ones move 3 or 4 KHz down before they quit oscillating.  If you can find some old Pepsodent tooth powder (not tooth paste) you can use that, a toothbrush and a little water to carefully grind the quartz and raise the frequency a bit.  Never got one to move more than a KHz up though.  Down is much easier.

Used to play with this all the time when I was stationed in Japan back in 1963-1966.  Through the MARS program we had hundreds of FT-243 crystals available.  Now I wish I'd kept a few - LOL

JIM, W0EB

Sent from my iPad

On Dec 26, 2016, at 5:39 PM, Johnny Matlock jomatlock@... [4sqrp] <4sqrp@...> wrote:

Ge Curt, 
I added a small 10-80 pico trim pot in series with my rock, then I could tweak it up a little?
Seemed to work well.
72
Johnny 
On Mon, Dec 26, 2016 at 4:28 PM rhulett1@... [4sqrp] <4sqrp@...> wrote:


















































Completed the build about an hour ago, took awhile to find the oscillator on the IC-728, ended up high by about 200 kHz so squeezed the coil, adjusted C30.  Now tuning 7010-7160 which suits me.  Plugged in a 7.050 FT243 crystal, transmits on 7.049. Not having much luck with the spotting procedure, need more practice I suppose.  Used the IC728 to get the receiver close to transmit frequency.  QRL a few times, coast was clear so CQ a few times.  K5ZSI about 130 miles from me answered, gave me a 569 report.

After verifying he wouldn't turn me in to the gestapo, told him was using a "spy radio" at about 2 watts powered with 8xAA cells.  It isn't in the wooden box yet so will hide it from the occupation troops in the cupboard when not in use until can finish the case. 

72, Curt KB5JO











































Re: Bayou Jumper First QSO!

Johnny AC0BQ
 

Ge Curt, 
I added a small 10-80 pico trim pot in series with my rock, then I could tweak it up a little?
Seemed to work well.
72
Johnny 

On Mon, Dec 26, 2016 at 4:28 PM rhulett1@... [4sqrp] <4sqrp@...> wrote:


















































Completed the build about an hour ago, took awhile to find the oscillator on the IC-728, ended up high by about 200 kHz so squeezed the coil, adjusted C30.  Now tuning 7010-7160 which suits me.  Plugged in a 7.050 FT243 crystal, transmits on 7.049. Not having much luck with the spotting procedure, need more practice I suppose.  Used the IC728 to get the receiver close to transmit frequency.  QRL a few times, coast was clear so CQ a few times.  K5ZSI about 130 miles from me answered, gave me a 569 report.

After verifying he wouldn't turn me in to the gestapo, told him was using a "spy radio" at about 2 watts powered with 8xAA cells.  It isn't in the wooden box yet so will hide it from the occupation troops in the cupboard when not in use until can finish the case. 

72, Curt KB5JO











































Re: Bayou Jumper First QSO!

Curt
 

Mine is on 7.121


Re: Straight Key Night

Johnny AC0BQ
 

Good Idea Randy
I have a few other crystals I need to mount so I can wiggle a little. It as well!
72
Johnny AC0BQ 

On Mon, Dec 26, 2016 at 5:01 PM KB4QQJ@... [4sqrp] <4sqrp@...> wrote:
























































I'll be there with mine...."Bayou Jumping" from crystal to

crystal.


7.122


7.112


7.114


7.050


Looking for you again Johnny!


 


Randy_KB4QQJ



 




In a message dated 12/26/2016 4:17:00 P.M. Eastern Standard Time,

4sqrp@... writes:


 





Hello Dave 


How cool is that!!


Super idea!!


Let Bayou Jumpers ring in the new Year on 7.122.


72


Johnny AC0BQ




 












































Re: Bayou Jumper First QSO!

Sam Neal
 

Monitoring 7122 for next 90 or so minutes.

Sam N5AF 2255Z
..........................................

------ Original Message ------
Received: Mon, 26 Dec 2016 04:32:28 PM CST
From: "'Lon Shelton' lon.shelton@... [4sqrp]" <4sqrp@...>
To: <4sqrp@...>, <rhulett1@...>
Subject: RE: [4sqrp] Bayou Jumper First QSO!

Bravo Zulu on finishing the build. Absolutely nothing more satisfying.. Hope
to cu folks on Straight Key Night. Will be on 7.122.



73, N5DJY



From: 4sqrp@... [mailto:4sqrp@...]
Sent: Monday, December 26, 2016 2:28 PM
To: 4sqrp@...
Subject: [4sqrp] Bayou Jumper First QSO!





Completed the build about an hour ago, took awhile to find the oscillator on
the IC-728, ended up high by about 200 kHz so squeezed the coil, adjusted C30.
Now tuning 7010-7160 which suits me. Plugged in a 7.050 FT243 crystal,
transmits on 7.049. Not having much luck with the spotting procedure, need
more practice I suppose. Used the IC728 to get the receiver close to transmit
frequency. QRL a few times, coast was clear so CQ a few times. K5ZSI about
130 miles from me answered, gave me a 569 report.

After verifying he wouldn't turn me in to the gestapo, told him was using a
"spy radio" at about 2 watts powered with 8xAA cells. It isn't in the wooden
box yet so will hide it from the occupation troops in the cupboard when not in
use until can finish the case.

72, Curt KB5JO