Date   

Happy Easter

Johnny AC0BQ
 

Ge all:
Happy Easter to all.
God bless you and yours.
72
Johnny AC0BQ


--
QRP....."more smiles per watt"
72
JOHNNY AC0BQ  ..


Re: Ozark Patrol problem - Disc Capacitors

Bob Nelson
 

Chuck,
Probably 99% of disc caps use a ceramic dielectric. The problem is that there are many kinds of ceramics, with widely differing characteristics. The EIA has a standard for coding what kind of ceramic is in each kind of ceramic cap. Some codes, say Z5U, denote a cap that is best suited for bypass caps; caps where the exact value of capacitance is not critical, but that the cap is physically small for the amount of capacitance it provides. Such ceramics as these are often highly unstable with respect to almost any parameter - voltage, temperature, vibration, you name it. But that does not matter in a typical bypass cap. Other ceramics are quite stable, but take up much more space than the example Z5U. These are sometimes denoted NP0 (negative, positive, zero capacitance change with temperature). And there is a myriad of ceramic types in between. So you must be careful when designing circuits to specify what KIND of ceramic capacitor is to be used in a particular place. Frequency filters designed with ceramic caps are particularly critical in this respect. There are other types of dielectrics used also, of course, depending on the application: mylar, polypropylene, tantalum, aluminum electrolytic , etc. But at radio frequencies, ceramics are by far the most popular. If properly designed in the beginning, that filter you are looking at should not need capacitor replacement. But if designed without care for the kind of ceramic caps used, it may be need re-work. It is much more likely that is the case than that the original ceramics have deteriorated, or that the original caps were made from "low quality" or obsolete materials. The wise circuit designer is well advised to study up on the many kinds of capacitors available out there. Same for inductors, and even resistors. Books have written on the subject ….

73 - Bob, K6KL (in ND)


Ozark Patrol problem - Disc Capacitors

Chuck Carpenter
 

I don't have the rig "yet" but a related problem, maybe.

In rigs with disc capacitors, I've found that output power was increased by replacing all the disc capacitors used in the otuput power and filter circuits with 5% COG/NP0 MLCC capacitors such as those from AVX and Kemet.

I reasoned that the discs were probably old technology and of poor quality materials?

For many years "back in the day" disc capacitors were what we used. But the times they are a changing... :-)


Chuck Carpenter, W5USJ
EM22cv, Rains Co. TX


Re: Ozark Patrol problem

W0PWE
 

It does not appear to be an NP0.
This probably needs some more evaluation. I'm listening to some very readable SSB signals on 75M tonight but it does not seem as sensitive as the higher band does and the regen control is a little more touchy than it is on the higher band. 


Re: Ozark Patrol problem

Jim Kortge
 

On 4/17/2014 9:27 PM, WA0ITP wrote:


Good catch Jerry!� � Is it an NP0 in your kit?
I'll bet it isn't!

72,

Jim, K8IQY


Re: Ozark Patrol problem

WA0ITP
 

Good catch Jerry!   Is it an NP0 in your kit?


On 4/17/2014 8:15 PM, j.b.hall@... wrote:
Ed,
On mine the switch is to the left for the higher frequency band. When switched to the right the 560pf capacitor is added in to the oscillator circuit and the lower band should be selected.

I put my scope on the Q1 collector and did some checking. On the high band it could easily be made to oscillate by turning the regen control. I measured the oscillator at roughly 4.6MHz to 13.5MHz at extremes of the tuning capacitor. 

When I switched to the low band however I could not make it oscillate anywhere in the band with any regen pot setting. I then pulled the 560pf capacitor (C11) and checked it with my AADE meter. It looked good (543pf). So then I tried various capacitors in place of C11. Various combinations of mono ceramic capacitors I had on hand all supported oscillation. Even up to about 700pf it oscillated without trouble. I'm not sure what it is about that 560pf disc ceramic but the oscillator doesn't seem to like it. Low Q maybe? 

My current combination of odd capacitors in C11 measures 526pf and the ends of the dial will oscillate at 3.4 and 4.6 MHz. If you have a different capacitor that you could try in C11 it might be worth a shot. Good Luck.
73 - Jerry

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


Re: Ozark Patrol problem

W0PWE
 

Ed,
On mine the switch is to the left for the higher frequency band. When switched to the right the 560pf capacitor is added in to the oscillator circuit and the lower band should be selected.

I put my scope on the Q1 collector and did some checking. On the high band it could easily be made to oscillate by turning the regen control. I measured the oscillator at roughly 4.6MHz to 13.5MHz at extremes of the tuning capacitor. 

When I switched to the low band however I could not make it oscillate anywhere in the band with any regen pot setting. I then pulled the 560pf capacitor (C11) and checked it with my AADE meter. It looked good (543pf). So then I tried various capacitors in place of C11. Various combinations of mono ceramic capacitors I had on hand all supported oscillation. Even up to about 700pf it oscillated without trouble. I'm not sure what it is about that 560pf disc ceramic but the oscillator doesn't seem to like it. Low Q maybe? 

My current combination of odd capacitors in C11 measures 526pf and the ends of the dial will oscillate at 3.4 and 4.6 MHz. If you have a different capacitor that you could try in C11 it might be worth a shot. Good Luck.
73 - Jerry


Re: Ozark Patrol problem

Paul Smith
 

I built a beta kit and there was only one band.
YMMV

de Paul Smith N0NBD

Sent from my iPad

On Apr 17, 2014, at 9:30 AM, <yahoomail@...> wrote:

 


Karen & I just finished up her Ozark Patrol kit from the Friday night build session.  It seemed to work great when first turned on.  However, when I flipped the BAND switch to the right and we got no REGEN at all.  Any ideas?  Works pretty well with the BAND switch in the left position which seems to be the LOW side.  On the low side we heard WLO coastal maritime station 4 Mhz range, WWV, and an Ontario VE3 on SSB.  Nice.

I twiddled both Gimmick caps but no change on the REGEN problem in the "high" band.

FYI - Karen & I had a blast at OzarkCon this year.  While the kit build ran a bit longer than anyone expected, the kit itself was GREAT!  The programs were, as usual, top quality, and the lunch was a welcome addition.  (Let's keep that as part of the on-going plan if possible.)  One of the best things was that we came home with about 5 kits to build!  We pulled the kitchen table into the living room so we have a work surface right in front of the big-screen TV.  Lots of solder smoke in our near future!

72,

-Ed, WG5F & Karen, W5KKM-


RMRc TODAY!! 2200z 14.0625 Y'all ch in!

Dale Putnam
 



Have a great day,
 
 
--... ...-- Dale - WC7S in Wy
 
 


Re: Thursday Morning Net [1 Attachment]

w2sh@...
 

Nice to see this morning's check-ins.  Terry and a few others were readable in NJ, but with 549 at best.  Tried to QNI between 1322-1327Z, but no luck. 

Although last night's 40m net was pretty shaky here, as opposed to 80m that was really FB, this Thursday morning net suffers mainly from the increasing noise as the hours of daylight increase.  I'll give it a try or two more, but think it won't work for me until around the autumnal equinox.

Noticing that K0NG appears in the list makes me wonder if his name might be King.  Hi!

72,

Charles (aka Chas), W2SH


To: 4sqrp@...
From: wa0itp@...
Date: Thu, 17 Apr 2014 08:55:00 -0500
Subject: [4sqrp] Thursday Morning Net [1 Attachment]

Great net this morning, 10 checkins.  Many thanks to all who jumped in. Great to hear 1rst timer K0NG. Antennas used were long wires, center fed zepps, trap verticals, inverted vees, and fan dipoles.  Hope to hear you all again next week.  Making it in were:



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


The bands...

Wayne Dillon
 

Those of you who can get to your radios need to get on 10 or 15M. unfortunately I'm at work but I'm looking at the DXMAPS display and boy oh boy 10 and 15 are hoppin.
Good luck and God Bless all
Wayne - KC0PMH

--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
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 - KC0PMH

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

4 State QRP Group NCS - 40m & 160m
4SQRP #95
FPQRP #342 (Flying Pigs QRP Club)
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155T
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686


Ozark Patrol problem

yahoomail@...
 


Karen & I just finished up her Ozark Patrol kit from the Friday night build session.  It seemed to work great when first turned on.  However, when I flipped the BAND switch to the right and we got no REGEN at all.  Any ideas?  Works pretty well with the BAND switch in the left position which seems to be the LOW side.  On the low side we heard WLO coastal maritime station 4 Mhz range, WWV, and an Ontario VE3 on SSB.  Nice.

I twiddled both Gimmick caps but no change on the REGEN problem in the "high" band.

FYI - Karen & I had a blast at OzarkCon this year.  While the kit build ran a bit longer than anyone expected, the kit itself was GREAT!  The programs were, as usual, top quality, and the lunch was a welcome addition.  (Let's keep that as part of the on-going plan if possible.)  One of the best things was that we came home with about 5 kits to build!  We pulled the kitchen table into the living room so we have a work surface right in front of the big-screen TV.  Lots of solder smoke in our near future!

72,

-Ed, WG5F & Karen, W5KKM-


Thursday Morning Net

WA0ITP
 

Great net this morning, 10 checkins.  Many thanks to all who jumped in. Great to hear 1rst timer K0NG. Antennas used were long wires, center fed zepps, trap verticals, inverted vees, and fan dipoles.  Hope to hear you all again next week.  Making it in were:



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


Re: April SSS Results

Steve Sellmeyer <ssellmeyer@...>
 

Hey Scott
 
Nice to see you on here and glad you are getting back on the air more.
 
I too gave a listen for the SSS but heard nothing but static so gave it up also.
 
Steve/WB0QQT


Last evening's 40m nets

Wayne Dillon
 

Good morning 4 Staters, 40 was most definitely behaving itself last night and we had a terrific 2 nets. I'm not going to divide them, just to say that the later net was better in some respects than the earlier one. Either way I feel that a good time was had by all. I apologize for my mistakes, I really wasn't feeling all that good last night (new Diabetes meds???) so thanks for hanging in there with me.
The setup last evening was my KX3 into the attic mounted 1/2 size G5RV, running 3 watts. Key was my favorite, the Swedish Pump. You'll see for yourselves just how good a shape the band was in.
Welcome also to the new check-ins, it was great to hear you and I hope you'll return again and again.

KB0KFX Scott WI
WB0QQT Steve NE
KD4OBQ Pat OK
KU4GW Cliff NC
W5RST Mike OK
KF0XV Joe KS
W2SH Chas NJ
KD0SZS Daniel MO
K4EQ Dale MO
WB0QQT Steve NE
W0OTM Marshall IA
AC0BQ Johnny KS

Thanks all and God Bless.
Let's do it all again next week.
72/3 de Wayne - KC0PMH

--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
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 - KC0PMH

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

4 State QRP Group NCS - 40m & 160m
4SQRP #95
FPQRP #342 (Flying Pigs QRP Club)
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155T
SOC #848
30MDG#1176
NEQRP #693
GORC #192
DMC (Digital Modes Club) # 06686


Re: April SSS Results

Jg
 

Actually this made me feel a bit better. Last month also Gary KF7WNS was my only contact. At least it wasn't just me feeling the pain in this one .

"John R. Lonigro" <jonigro@...> wrote:

Rod:

I guess it was a bust all around.

I'm curious. Did you receive the reminders I sent last Thursday,
Saturday and Sunday? With the poor response, I was wondering if the
reminders made it to the list.

Thanks,

John AA0VE


On 04/16/2014 07:45 AM, Rod Schrivener wrote:

Hello John....
Guess I should have sent in a "nothing to report" as well. Noise was
so bad here in Kearney, MO that I only heard one station
during the time frame. Could not work him. N0YJ was on, but really
down in the mud. Next time, I will send in a report anyway
jsut so you have something to report.
Maybe conditions will be better then..
72/73
Rod, W5GZT

*********** REPLY SEPARATOR ***********

On 4/16/2014 at 6:42 AM John R. Lonigro wrote:

Well, the April SSS was almost a non-event. The "high" for this month
was turned in by both Gary, KF7WNS and John, WB6HVH. They each had 1
QSO. You can guess who they talked to! Chuck, W2SH and Bill, KV6Z
were
tied for third place, each reporting 0 QSOs.

I know we had some bad thunderstorms in the St. Louis area Sunday
night,
which prompted me to disconnect the radios and turn off the
computers.
My guess is that line of storms pretty much swept through the midwest
during sprint time and nobody wanted to risk getting lightning hits.
Another possibility would be a conflict with Palm Sunday events.

Anyway, I'm including the updated standings, as of today. As
always, if
you find an error or omission, please let me know.

Thanks and 72,

John AA0VE


Wed. night PSK checkins.

Dick Hammond
 

KA0KRN  David  Ottumwa, IA
AC0WZ Dan Fulton, MO
AE5ZZ  Jim, Little Rock, AR
K6QKL  Chuck, Fairview Hts. IL
KU4GW   Floyd, Taylorsville, N.C. (new)
tnx to all checkins, some  QRM but readable.
N0TGR  Dick, Augusta.KS  NCS


Re: Wed Nite CW Net [1 Attachment]

Michael Murphy
 

Great sigs tonight Terry. You were an honest 599 here in Ohio this evening.  And you are right, quiet for 80 meters, especially for this time of year.

Looking forward to Dayton next month.  Hope to see you at FDIM again this year.

72

Mike - KI8R


On Wed, Apr 16, 2014 at 10:01 PM, WA0ITP <wa0itp@...> wrote:
Great night to be on 80M, 11 checkins.  The band was in good shape and quiet too, a rarity for sure. Bert was warmest with 69 degrees, and Charles was the coolest at 38F.  Thanks to all who made it in. Hope to cu again next week and others too.


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



--
-----------------------------------------------
Michael Murphy - KI8R

mike@...

twitter.com/ki8r

www.ki8r.com

614-371-8265 (cell)

4SQRP #388
QRPARCI #14941
NAQCC #6432
FLYING PIGS #3100
KX3 #3254
-----------------------------------------------


Wed Nite CW Net

WA0ITP
 

Great night to be on 80M, 11 checkins.  The band was in good shape and quiet too, a rarity for sure. Bert was warmest with 69 degrees, and Charles was the coolest at 38F.  Thanks to all who made it in. Hope to cu again next week and others too.


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


Thursday Morning Net

WA0ITP
 

This Four State net meets each Thursday morning at 8:00 AM Central on 7122 kc,
the Four State 40M hangout frequency. NCS is WA�ITP and this is a Four State
members only net.

Add anything to the exchange that you wish, member number, temp, rig, ant, etc.
After the net, a list of checkins will be posted on the Four State reflector.

Hope to cu tomorrow morning at 8:00 AM Central.

--
72 WA�ITP
I love this radio stuff.
www.wa0itp.com
www.4sqrp.com