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Re: Ozark Patrol Tuning adjustment question
Timothy East
I was very happy to see the mods for the Murania kit to really improve its performance.
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Is there a list of mods that I can use to improve my OZark Patrol? Tim K0EMP
On Apr 21, 2020, at 19:00, Jerome Wysocki <jeromewysocki48@gmail.com> wrote:
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Re: Ozark Patrol Tuning adjustment question
Thanks, Curt. Your audio files sound just like my receiver does on 80 and 75 meters, but only after the addition of the 10 ohm resistor to the one turn feedback coil going through the center of the torroid coil, as I described it. Mine does not like long antennas, so I use a 30 foot longwire. Furthermore, I substituted a small adjustable trimmer capacitor to replace the gimmick capacitor in the original design. This allows me to better control the input from possible overload by reducing the coupling with the antenna. Adjusting that trimmer helped me do precisely that.
I tried substituting a 2N2222 for the original detector transistor, but found nothing really significantly different in receiver performance with either one. All resistors were within spec when I tested them, prior to installation. Maybe some critical capacitors surrounding the detector transistor are marginal, relative to their specs, and are just off enough to cause the problem I am having. (I carefully observed that no mistakes were made in part identifications, prior to soldering them into place.) No solder bridges or cold joints were observed either, as far as I can see. Voltages appear normal. Thanks again, Curt. I'm sure I'm missing something simple, and I'll probably kick myself when I find it 🙂. Meanwhile, it works really well on cw and ssb on 80 and 75 meters, and is good enough for a QRP cw receiver on that band. ... Jerry Wysocki, KC9JXE
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Re: Ozark Patrol Tuning adjustment question
Curt
Here is what it sounds like on 40M:
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Re: Ozark Patrol Tuning adjustment question
Curt
My regeneration works well on both bands. I listen to 80 & 75 in the evening, 40, 30, and 20 during the day. I added a little tiny LM386 audio amplifier so now can listen to everything without headphones.
My only issue, which isn't a large one is that my tuning cant match up the the index marks on the dial. Curt KB5JO
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Re: N75 Saturday Morning Gathering.
Charles W. Powell
I’m missing out on the fun here!
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73, Charles - 5H3DX
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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
Hi Curt,
The most likely thing to do, I think, is to replace (change the value) of c11, a 560 pF capacitor, that is wired to the toggle switch, that is your band switch. 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.) I also found that increasing the battery voltage from 9 to 15 volts, the tuning ranges changed noticeably on both bands. That might be another option to experiment with. (15 volts also gives much higher audio to the speaker.) How is your regeneration control doing? Mine was very unstable on both bands until I inserted a 10 ohm resistor in series with the one turn (feedback) loop that goes to the center of the torroid coil ring. (I've built a number of regenerative receivers before, so am familiar with good ones and unstable ones.) I connected the resistor to the one turn loop, on the side that was outside the center of the torroid coil. That vastly improved the stability of the regeneration control. Encouraged by this, I will fine tune the resistor value to see if I can get even smoother regeneration. (Greater that 10 ohms, and I lose all regeneration, but I might get better stability with, say 8 ohms. I will have to try this.) How does the performance on the two bands of your receiver compare? Mine is now very stable and useable for cw and ssb on 80 meters, but no luck yet on the top band, for 40 meters. Hope this helps you out. ... Jerry Wysocki, KC9JXE
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qrparci reflector at groups.io
Still plenty of openings for the qrparci reflector.
450 members so far. Lots of contest chit chat.
You may/should advertise your QRP contests
and/or activities on this club reflector.
For example, check out the posts to the recent SPRING
QSO PARTY event: qrpcontest.org with over 60 entries.
Click on SPRING QSO PARTY…
It all happened due to huge publicity on the qrparci
reflector: qrparci.groups.io Take a look; the posts
or open to read and easily searchable.
You do not have to be a club member to join this reflector but
if you are a member of qrparci, this is your
club’s reflector. Ask questions, get latest news, when
QQ ships, etc.
If your email address does not include your callsign…
the also send your callsign to cw at w4qo.com
qrparci.groups.io Then hit the SUBSCRIBE button.
Have you checked out the RBN skimmer for
members of various CW clubs:
http://rbn.telegraphy.de/ Good way to spot
SKCC, CW OPS, QRPARCI, etc. To see your
callsign, just call CQ or send TEST followed by
your callsign. This assumes you belong to one
of the clubs listed.
NOTE: this is not trying to take traffic away
from QRP-L or any other reflector. With so
many sitting inside these days, plenty of time to
read lots of ham radio news….
And check out the FL QSO PARTY this weekend:
QRP category! Lots of stations on the air from FLA...
Take care.
jim/w4qo
qrparci #6515
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Ozark Patrol Tuning adjustment question
Curt
Can anyone advise about adjusting the Ozark Patrol tuning range? On the top band, mine covers 4.6-16.2 MHz, a range of 11.6. The marked dial is 5-12 or a range of 7.
On the bottom band it covers 3.3 - 4.5 range of 1.2, marked range 3-5 range of 2 So the range is small on the lower band but wide on the upper band. The radio functions fine as it stands, but would like to get it set closer to the dial. I am wondering if adjusting the pad/trim trimmers on the variable capacitor would provide some improvement? Suggestions? Curt KB5JO
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Re: Solder Paste / Flux ... where to buy
Thanks for the info Charles. I didn’t know we had a new Radio Shack In town. 73 Johnny AC0BQ
On Sun, Apr 19, 2020 at 7:43 AM Charles Wells <odu1993@...> wrote:
--
Check out the 4SQRP website at 4sqrp.com
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Re: Solder Paste / Flux ... where to buy
Charles Wells
I'm not sure about the quality. Their stock is a real mix of old and new with some 3rd party packaged components. Since I tend to not buy one's and twos of parts (usually cheaper by the dozen) I don't go in often.
On Sun, Apr 19, 2020, 07:09 Nate Bargmann <n0nb@...> wrote: * On 2020 18 Apr 18:54 -0500, Charles Wells wrote:
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Re: Solder Paste / Flux ... where to buy
* On 2020 18 Apr 18:54 -0500, Charles Wells wrote:
We've a Radio Shack in our smaller town of Emporia, KS. Opened fairlyHas the quality of the parts been improved? I recall connectors that had insulation that looked like Teflon but when soldered would melt like cheap PVC. 72, Nate -- "The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true." Web: https://www.n0nb.us Projects: https://github.com/N0NB GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819
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Re: Nouveau 75A PTT
Timothy East
How did tonight's attempt work. I had a Church commitment come up and was unable to join.
Tim
K0EMP
PS - Like the font? Look at the 0
From: main@4SQRP.groups.io <main@4SQRP.groups.io> on behalf of Johnny Matlock <jomatlock@...>
Sent: Saturday, April 18, 2020 10:08 AM To: main@4sqrp.groups.io <main@4sqrp.groups.io> Subject: Re: [4SQRP] Nouveau 75A PTT Well
That didn't work too well?
I heard sigs on 3875 about 8:30 and by 9:30 they were gone.
Bert and I are about 40 miles apart and you could just hear something on 3.730, not enough to copy.
We can try again late this evening, signals might be better?
Say around 8:00 pm CDST?
72
Johnny AC0BQ
I am in New England and it seems that as the morning goes on, the signals get weaker and the noise gets louder.
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Re: Solder Paste / Flux ... where to buy
Charles Wells
We've a Radio Shack in our smaller town of Emporia, KS. Opened fairly recently. The proprietor told me that all of the RS now operating or opening are independent franchise stores. He indicated that RS corporate would continue to supply inventory for a long time.
On Sat, Apr 18, 2020, 17:59 N7JS <jimsouthwick2@...> wrote:
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Re: Solder Paste / Flux ... where to buy
N7JS
We've got one here in Layton, Utah as well. People opening shop under the Franchise name. More stocked with individual electronic parts than you can shake a stick at. Hope they can make it a go. 73 Jim, N7JS
On 4/18/2020 2:27 PM, John Nicholas
wrote:
Ha! Guess, I’m lucky. Check out
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Re: Solder Paste / Flux ... where to buy
... hmmm, "not supplying their warehouses anymore"? If true, that's a bad sign for them, like going out of business, once and for all, end of enterprise. First, stores gone, then warehouses?
... Jerry Wysocki, KC9JXE
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Re: Solder Paste / Flux ... where to buy
Ha! Guess, I’m lucky. Check out
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Located 1.5 miles from here, in Derby, KS - just outside of Wichita. Radio Shack! E0ZUW John Nicholas Amateur Radio General Class Operator Member ARRL, Wichita ARC, & Air Capitol Tech-N-Chat ARC Grid Square EM17im
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Re: Solder Paste / Flux ... where to buy
W4OED
Try this link:
https://www.radioshack.com/search?q=solder&type=product I have been buying things from RS on line for some months now. They sometimes have good deals, but they are still RS quality. In addition, they are running out of stock and they are not replenishing their warehouse any more. What is gone, is gone forever. Stay healthy, Oscar W4OED
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Re: Solder Paste / Flux ... where to buy
Daniel Reynolds
I had an immediate need, and with amazon slowing down shipment of non-essential items... I ended up going to eBay and paying a little more for shipping - BUT getting things here in a week vs 2-3 weeks. Daniel/AA0NI OKC
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Re: Solder Paste / Flux ... where to buy
Ryan Laurie
Hello, You should be able to get a modest amount in a tube down at the local hardware, or home Depot/Lowe's type store for repairs to pipe. Much smaller container should be readily available, and cheap. Ryan W∅WLY
On Sat, Apr 18, 2020, 12:27 PM Gordon Saunders <kw4cz49@...> wrote: Greetings all,
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