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Re: Member List
davemrtn
In fact if someone wants to see where people have come from to attend OzarkCon, just look at this web page.......
www.ozarkcon.com/attendanceHistory
David Martin - NA1MH - Mountain
Home, Ar.
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On 2/8/2017 22:01, Tim McDonough N9PUZ
tim.n9puz@... [4sqrp] wrote:
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Re: Member List
Tim N9PUZ
There are people who come to OzarkCon from Michigan now! Why move?
toggle quoted messageShow quoted text
:-) Tim N9PUZ
On 2/8/2017 9:28 PM, Bill Cromwell wrcromwell@gmail.com [4sqrp] wrote:
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Re: Member List
Bill Cromwell
Here ya go...
toggle quoted messageShow quoted text
Move OzarkCon to Grayling Michigan! 73, Bill KU8H
On 02/08/2017 09:07 PM, David Martin davemrtn@centurytel.net [4sqrp] wrote:
--
bark less - wag more
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Re: 43SQRP net
Paul Smith
Thanks for the report Charles, I was getting some thunderstorm static as well. not sure from where but it was there de Paul N0NBD
Sent from Outlook
From: Charles Moizeau
Sent: Thursday, February 9, 2017 2:13 AM To: 4sqrp@...; Paul Smith Subject: Re: 43SQRP net Condx in NJ are very noisy with a major snow storm arriving here in six hours. At 0130Z-ish I heard Wayne at 449. Normally WA9PWP is the sig champ, but I didn't hear him. Surprisingly, the other Paul, N0NBD, was nearly 569.
Charles, W2SH
From: 4sqrp@... <4sqrp@...> on behalf of Paul Smith psmith61@... [4sqrp] <4sqrp@...>
Sent: Wednesday, February 8, 2017 8:57 PM To: 4sqrp@... Subject: [4sqrp] 43SQRP net WOW I had a bunch of noise here tonight I did get WA0ITP Terry WA8PWP Paul WN0WWY Dale. Thanks Terry for the relay.de Paul N0NBD
Sent from Outlook
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Re: 43SQRP net
w2sh@...
Condx in NJ are very noisy with a major snow storm arriving here in six hours. At 0130Z-ish I heard Wayne at 449. Normally WA9PWP is the sig champ, but I didn't hear him. Surprisingly, the other Paul, N0NBD, was nearly 569.
Charles, W2SH
From: 4sqrp@... <4sqrp@...> on behalf of Paul Smith psmith61@... [4sqrp] <4sqrp@...>
Sent: Wednesday, February 8, 2017 8:57 PM To: 4sqrp@... Subject: [4sqrp] 43SQRP net WOW I had a bunch of noise here tonight I did get WA0ITP Terry WA8PWP Paul WN0WWY Dale. Thanks Terry for the relay.de Paul N0NBD
Sent from Outlook
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Re: Member List
davemrtn
That would be a 'historic' OzarkCon event ! How do we make it happen !!!
???? David Martin - NA1MH - Mountain
Home, Ar.
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On 2/8/2017 19:41, ktalbott
ktalbott@... [4sqrp] wrote:
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43SQRP net
Paul Smith
WOW I had a bunch of noise here tonight I did get WA0ITP Terry WA8PWP Paul WN0WWY Dale. Thanks Terry for the relay.de Paul N0NBD
Sent from Outlook
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Re: Member List
It would be interesting to see them all at Ozarkcon! Ken ke4rg Sent from Samsung Mobile
-------- Original message --------
From: "Johnny Matlock jomatlock@... [4sqrp]" <4sqrp@...> Date: 02/08/2017 5:54 PM (GMT-05:00) To: 4sqrp@...,davemrtn <davemrtn@...> Subject: Re: [4sqrp] Member List Look out SKCC here we come!! Thanks for the info Dave Johnny AC0BQ
-- Sent from Gmail Mobile
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Re: Hot IRF510
Thank you to all the responses. Will evaluate further and replace the IRF510. Dave K8WPE
On Feb 8, 2017, at 6:24 PM, nw8l@... [4sqrp] <4sqrp@...> wrote:
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Re: Hot IRF510
Jim, N5IB
Sounds like that may be another instance of a failed Q6. That is a clever circuit that minimized voltage drop in the supply line, but the IRF510 can be damaged by esd. When (if) you replace it, tack a 470K or a 1 Meg in parallel with a 0.01 uF cap across from gate to source. That will protect it from most esd, and will only pull a few uA from your power source.
On the temp stability.... the iron powder of the toroid core has a positive temperature coefficient. One trick you can do is replace C20 with a polystyrene capacitor. They have a negative coefficient. Don't expect to cancel the drift, but at least they'll be going in opposite directions. N5IB
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Re: Hot IRF510
Bob NW8L
Oops, the link to the ARRL note was truncated, here it is again:
Bob NW8L ---In 4sqrp@..., <nw8l@...> wrote : Yes, I ran into the same problem, Q6 failed and was running extremely hot etc. not long after I built the kit. At first I removed it and completed the (-) path with a piece of wire, later I replaced it to restore the polarity protection it offers. The gate of Q6 (a MOSFET) is directly connected to the (+) input power pin. I suspect that it was damaged by static discharge, so now I'm very careful when connecting the power to the radio. Eventually I'll lift the gate lead of Q6 and kludge in an RC ESD protection network like that seen in figure 2 of this ARRL note: If that works out I'll have additional peace of mind, it's very dry here in NM and electrostatic discharge can be a problem. Bob NW8L ---In 4sqrp@..., <djwilcox01@...> wrote : I am finding that my reverse voltage IRF510 is running hot enough to burn my fingers, even when the BJ is switched off. I was questioning why my Jet Ski battery was running down after a few days of "just sitting on the bench" while connected to the turned off BJ. Any suggestions? Also the receiver oscillator transistor seems to be the temp sensitive wandering part. I sprayed lightly each part with coolant air and that part seems to move frequency the fastest and the farthest. The toroid is also temperature sensitive but less so. Dave K8WPE Dave K8WPE
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Re: Hot IRF510
Bob NW8L
Yes, I ran into the same problem, Q6 failed and was running extremely hot etc. not long after I built the kit.
At first I removed it and completed the (-) path with a piece of wire, later I replaced it to restore the polarity protection it offers. The gate of Q6 (a MOSFET) is directly connected to the (+) input power pin. I suspect that it was damaged by static discharge, so now I'm very careful when connecting the power to the radio. Eventually I'll lift the gate lead of Q6 and kludge in an RC ESD protection network like that seen in figure 2 of this ARRL note: If that works out I'll have additional peace of mind, it's very dry here in NM and electrostatic discharge can be a problem. Bob NW8L ---In 4sqrp@..., <djwilcox01@...> wrote : I am finding that my reverse voltage IRF510 is running hot enough to burn my fingers, even when the BJ is switched off. I was questioning why my Jet Ski battery was running down after a few days of "just sitting on the bench" while connected to the turned off BJ. Any suggestions? Also the receiver oscillator transistor seems to be the temp sensitive wandering part. I sprayed lightly each part with coolant air and that part seems to move frequency the fastest and the farthest. The toroid is also temperature sensitive but less so. Dave K8WPE Dave K8WPE
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Re: Second Sunday Sprint
Bry Carling <af4k@...>
Bravo
This will give us something fun to do after most things are finished at the Orlando Hamcation! Bry, AF4K / WN4NRR
From: 4sqrp@... <4sqrp@...> on behalf of 'John R. Lonigro' jonigro@... [4sqrp] <4sqrp@...>
Sent: Wednesday, February 8, 2017 9:06 AM To: 4SQRP Subject: [4sqrp] Second Sunday Sprint The Second Sunday Sprint is this coming Sunday, February 12th, 7:00-9:00
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Re: Member List
Look out SKCC here we come!! Thanks for the info Dave Johnny AC0BQ
-- Sent from Gmail Mobile
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Re: Ocon Oscillator Hunt
WA0ITP
Hi Bill,
toggle quoted messageShow quoted text
Fb on the Alex Loop, sounds like a good DF loop. Bet quite a few of the guys have them or another magloop. The hunt is on! 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com On 2/8/2017 3:45 PM, dekle wrote:
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Re: Ocon Oscillator Hunt
The original QST article about the Snoop Loop is at: http://p1k.arrl.org/pubs_archive/38970 73 de George, KD0RII
On 2/8/2017 13:47, WA0ITP
wa0itp@... [4sqrp] wrote:
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Re: Ocon Oscillator Hunt
dekle <dekle@...>
toggle quoted messageShow quoted text
Terry,
I just looked at the "Snoop Loop" you referenced
and it got me thinking.
I realized that I already had a DF loop - the Alex
Loop.
Although it is bigger and requires a receiver, it can be
easily hand-held.
I tried it with a HB-1B and it works great.
The null is broadside to the loop and very
sharp.
It doesn't have front/back directional discrimination,
but with a little triangulation, the Hidden Oscillator would be easy to
find.
A little team work would be an asset here, but the
"team" will have to decide who gets the prize.
Thanks for the reference!
Bill
KV6Z
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Al Gulseth
David Lininger
Al, I've managed to lose your edress. Please email me. Thanks.
-- David Lininger, kb0zke Rev. 2:10 kb0zke@gmail.com
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Hot IRF510
I am finding that my reverse voltage IRF510 is running hot enough to burn my fingers, even when the BJ is switched off. I was questioning why my Jet Ski battery was running down after a few days of "just sitting on the bench" while connected to the turned off BJ.
Any suggestions? Also the receiver oscillator transistor seems to be the temp sensitive wandering part. I sprayed lightly each part with coolant air and that part seems to move frequency the fastest and the farthest. The toroid is also temperature sensitive but less so. Dave K8WPE Dave K8WPE
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Ocon Oscillator Hunt
WA0ITP
I'll try again, didn't see
the first post.
Just ran across this article on direction finding antennas. Some versions look easy to build and would be good for the Ocon Oscillator Hunt. The Snoop Loop abt halfway down the page looks quite good for our purposes. http://www.ce5prd.cl/documentos/antenna_handbook/14.pdf 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com -------- Forwarded Message --------
Just ran across this article on direction finding antennas. Some vbersions look easy to build and would be good for the Ocon Oscillator Hunt. The Snoop Loop abt halfway down the page looks very good for our purposes. http://www.ce5prd.cl/documentos/antenna_handbook/14.pdf -- 72 WAØITP I love this radio stuff. www.wa0itp.com www.4sqrp.com
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