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Re: Ozark Patrol Tuning adjustment question
Tom Denton
Back to the original question. When I asked Russ Ramirez this same question he replied:
Typically to get a dial on a receiver, signal generator, etc. you have an adjustable coil for the low-end of the band in question and a variable cap for the high end. In this case, the inductance is fixed and yes, the 560 pf capacitor can probably be increased a little to bring things in line. A 680 pf cap may not be excessive, but if it is, then another cap in parallel will be additive. If you happen to have a small trimmer cap to solder in parallel, that would be a good way to dial things in. I posted this earlier but cutoff Russ' reply. Tom w9kkq
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Re: 40 and 80 meter nets
Fellow CW-nauts: I put up a new 132 ft MFJ Half-wave as an inverted vee with the apex at 60+ ft, broadside to the NW (facing Missouri), used my full 100W (big stuff for a QRP guy), my first time on the 4SQRP 40 mtr net last night: At my QTH just outside the Atlanta perimeter, S 7 to S 9 noise including QRM, QRN, plus QSB. The Latin America sideband guys were in there, too. Using headphones, CW filter, and some DSP, I heard/worked WA9PWP Paul in WI; KK4ITX; WQ8S in MI?. KK4ITX was strong, then nothing. On 80 mtrs, nothing. Charlie Brown would say, “rats!” Just before 40 mtr net I worked K9YA Club station in Skokie, IL. TNX ES 73/72 DE KD4MSR, "Professor L. O. Power,” Scott (BTW, my long-planned late May Katy Trail bicycle trip across MO looks to be cancelled.)
Scott H. Sikes, MBA, CFRE, FAHP, CFP Principal & Partner Columns Fundraising, LLC 2870 Peachtree Road, Suite 956 Atlanta, GA 30305 Direct: 404-304-5237
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Re: 40 and 80 meter nets
Paul Goemans
Yes,
toggle quoted messageShow quoted text
I got the ITX once! WA9PWP Sent from Pauls iPhone
On Apr 22, 2020, at 10:01 PM, John - KK4ITX via groups.io <jleahy00@...> wrote:
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Re: 40 and 80 meter nets
Paul,
toggle quoted messageShow quoted text
I was probably the other “4” in the noise, almost had two K4DMSR and another I cannot remember. Between the QRM (I get some Latin America stations on LSB on 7122 often) and the QSB it was not in the cards. Made some noise anyway. 73, John KK4ITX
On Apr 22, 2020, at 22:31, Paul Goemans <wa9pwp@...> wrote:
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Re: 40 and 80 meter nets
Paul Goemans
Well,
I did have QSOs with KD4MSR and W2SH on 40 meters. There was another “4”
station way down in the noise...
Paul
Goemans WA9PWP
Stoughton, WI
From: Johnny
Matlock
Sent: Wednesday, April 22, 2020 7:38 PM
To: 4sqrpio
Subject: [4SQRP] 40 and 80 meter nets Ge Group
We have showers and lightning near by, so no NCS for me tonight on
HF.
Jump in call 4 Sqrp and have fun!
72
Johnny -- Check out
the 4SQRP website at 4sqrp.com
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Re: 40 and 80 meter nets
w2sh@...
Guess I and a couple of others should have checked our e-mail in-boxes before going QRV. I had lightning, thunder and high winds yesterday and was entirely disconnected and grounded. Today was
gud wx so I tuned up on 40m. Did a couple of "4s?" and raised WA9PWP at 589. Stood by and then heard KD4MSR at 579. Paul and Scott had a short exchange and then we three waited in the wings, but nothing happened.
Went next to 80m. Heard WNØWNY on 3,564 kHz at 559 but nothing else.
CU guys later.
72,
Charles (aka Chas), W2SH
From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of Johnny Matlock <jomatlock@...>
Sent: Wednesday, April 22, 2020 20:38 To: 4sqrpio <4SQRP@groups.io> Subject: [4SQRP] 40 and 80 meter nets Ge Group
We have showers and lightning near by, so no NCS for me tonight on HF.
Jump in call 4 Sqrp and have fun!
72
Johnny
-- Check out the 4SQRP website at
4sqrp.com
-- Charles Moizeau, W2SH
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Delta Mike Romeo Net
Robert
Good Evening and thanks to all who checked in to tonight's NET KC0IFQ DENNIS N0TGR DICK KB9JLO DAN AC0BQ JOHNNY WG5F ED KU5M JOE K0EMT BRYAN 73'S AND STAY WELL Bert N0YJ
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Wednesday Evening 40 and 80 meter Nets - Wed, 04/22/2020
#cal-notice
main@4SQRP.groups.io Calendar <noreply@...>
Wednesday Evening 40 and 80 meter Nets When: Where: Organizer: Description:
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Re: Ozark Patrol Tuning adjustment question
Tom Sevart
On 4/22/2020 16:25, W5ESE wrote:
They still do; although now it's assessed on television sets. It originally was assessed on radio receivers.When I was over there serving with the USAF, in the summer of 1993 we had the last Friendship Fete that I attended on our base since I left at the end of that summer. They had a TV detector van on display and a guy showed me how the equipment worked. Basically they had a spectrum analyzer display inside the van and really not much else. There were antennas installed on each corner of the roof of the van, which IIRC consisted of a small horizontal dipole in front of a reflecting screen. -- Tom Sevart N2UHC St. Paul, KS -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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40 and 80 meter nets
Ge Group We have showers and lightning near by, so no NCS for me tonight on HF. Jump in call 4 Sqrp and have fun! 72 Johnny -- Check out the 4SQRP website at 4sqrp.com
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Re: Ozark Patrol Tuning adjustment question
They still do; although now it's assessed on television sets. It originally was assessed on radio receivers.
https://www.theguardian.com/media/2019/dec/16/qa-how-the-bbc-is-funded-by-tv-licences They're considering abolishing it; as some feel the BBC has become increasingly biased.
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Re: Ozark Patrol Tuning adjustment question
Lee Bahr
The Paraset was only issued to agents in rural locations because of the regenerative signal. Even then it was dangerous to be using one. Lee, w0vt
On 4/22/2020 9:43 AM, Curt via
groups.io wrote:
"I believe with the 560 pF capacitor switched in the circuit, to parallel it to c1 (the 365 pF variable tuning capacitor) you are on the higher frequency band, and when c11 is not in parallel with c1, you are tuning the lower frequency band. (I hope my logic isn't reversed here.)"
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Re: Ozark Patrol Tuning adjustment question
War time Restrictions. Owning and listening was not the real issue. It was owning and listening to Nazi broadcasts as a cover for spying. Finding an unlicensed receiver, might uncover a transmitter used for spying.
toggle quoted messageShow quoted text
John Nicholas KE0ZUW
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Re: Ozark Patrol Tuning adjustment question
W6BOW
Jerome,
Fascinatin' stuff. Thank you for sharing.
Don W6BOW
-----Original Message-----
From: Jerome Wysocki <jeromewysocki48@...> To: main@4SQRP.groups.io Sent: Wed, Apr 22, 2020 11:37 am Subject: Re: [4SQRP] Ozark Patrol Tuning adjustment question I heard the same story about radiation from the regenerative Paraset receivers, and how they could be tracked down with direction finding radio receivers. So I fired up one of my experimental regenerative radios, but only used about 32 volts for the detector B+. It regenerated fine so I took a small portable hand held short wave radio with me for a walk around the neighborhood. With the set in my house still oscillating, I could pick up its radiated signal for at least several hundred feet away from my house. Imagine the range I could have gotten if I increased to detector B+ up to around 250 volts or so, typically to what a regenerative Paraset radio would be operating with. No wonder they were careful to minimize listening time!
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Upcoming Event: Wednesday Evening 40 and 80 meter Nets - Wed, 04/22/2020 20:00-21:00
#cal-reminder
main@4SQRP.groups.io Calendar <main@...>
Reminder: Wednesday Evening 40 and 80 meter Nets When: Wednesday, 22 April 2020, 20:00 to 21:00, (GMT-05:00) America/Chicago Where:40 and 80 Meters Organizer: jomatlock@... Description: The 40 Meter Net will be at 8:00 pm central time on 7.122 +-. QRM
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Re: Ozark Patrol Tuning adjustment question
I heard the same story about radiation from the regenerative Paraset receivers, and how they could be tracked down with direction finding radio receivers. So I fired up one of my experimental regenerative radios, but only used about 32 volts for the detector B+. It regenerated fine so I took a small portable hand held short wave radio with me for a walk around the neighborhood. With the set in my house still oscillating, I could pick up its radiated signal for at least several hundred feet away from my house. Imagine the range I could have gotten if I increased to detector B+ up to around 250 volts or so, typically to what a regenerative Paraset radio would be operating with. No wonder they were careful to minimize listening time!
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Re: Ozark Patrol Tuning adjustment question
Curt
So the British actually charged people a fee to LISTEN to a radio??!! Wonder how their DF vans would have dealt with a crystal set. Maybe if caught with a 1N34A or Oatmeal box wound with wire in the house the bobbies would put the cuffs on :-o
Curt KB5JO
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Re: Ozark Patrol Tuning adjustment question
Tom Denton
When I asked this question of Russ Ramirez, this was his reply:
toggle quoted messageShow quoted text
On Sun, Mar 24, 2019, 5:11 PM Russ Ramirez <russ.ramirez@...> wrote:
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Re: Ozark Patrol Tuning adjustment question
Frank Perkins
No Gwen, Those British vans are searching for tea & crumpet shops! :-) Frank N6CES
On Wed, Apr 22, 2020, 9:32 AM Gwen Patton <ardrhi@...> wrote:
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Re: Ozark Patrol Tuning adjustment question
w9ran <w9ran@...>
On 4/22/2020 11:32 AM, Gwen Patton wrote:
Perhaps our British members might be able to verify if this is how the BBC's roving radio detection vans would locate people who hadn't paid their radio license fees? I've seen pictures of these vans, with DF loops on them, to sniff out scofflaws, and I wonder if that's what they were designed to detect.Not since 1971: https://www.sixtiescity.net/Television/Licences.htm I suspect by then there were few if any regens still in use, but while radio licenses were required those vans did try to DF the weak radiation from local oscillators in superhet receivers in an attempt to find unlicensed receivers. Had to be unrewarding work ;-) 73, Bob W9RAN
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