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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TenTec\]\s+252Mo\s+supply\s*$/: 19 ]

Total 19 documents matching your query.

1. [TenTec] 252mo supply (score: 1)
Author: Chris Howard w0ep <w0ep@w0ep.us>
Date: Sun, 08 Feb 2015 19:41:01 -0600
I was tuning up the antenna with my Omni-D yesterday afternoon and everything went completely dead. I was not high on SWR and not turned up to maximum power. Turning things off and on I was able to g
/archives//html/TenTec/2015-02/msg00020.html (6,952 bytes)

2. Re: [TenTec] 252mo supply (score: 1)
Author: Ralph Arnold <rea.papaof10@gmail.com>
Date: Mon, 9 Feb 2015 01:22:11 -0200
I had the same problem with my OMNI D the PS is bad mine blew the Bridge Rectifer and the 3055 Voltage Regulators were leaky I also replaced the electrolytic cap it was old Now it works like a champ
/archives//html/TenTec/2015-02/msg00021.html (8,249 bytes)

3. Re: [TenTec] 252mo supply (score: 1)
Author: Chris Howard w0ep <w0ep@w0ep.us>
Date: Mon, 09 Feb 2015 13:24:09 -0600
Thank you Ralph! I hooked the Omni up to a Pyramid linear supply that I have here. I can run up to about 10 watts and then the voltage sags enough to cause the frequency to change. So, I am ok if I s
/archives//html/TenTec/2015-02/msg00029.html (9,512 bytes)

4. Re: [TenTec] 252mo supply (score: 1)
Author: Chris Howard w0ep <w0ep@w0ep.us>
Date: Thu, 26 Feb 2015 10:37:14 -0600
My bridge rectifier seemed to be ok. But the big pass transistor was reading dead short between collector and base. I replaced that with another 2n3055 that I had on hand. That seems to have done the
/archives//html/TenTec/2015-02/msg00134.html (10,623 bytes)

5. Re: [TenTec] 252mo supply (score: 1)
Author: "Al Sirois" <alsirois@roadrunner.com>
Date: Thu, 26 Feb 2015 12:19:24 -0500
Thursday noontime, guys: My discussions with Paul at T-T some time ago, told me NOT to use the 252mo supply with the Jupiter or Scout. He said it doesn't keep the voltage about 12.1 VDC. The 252om is
/archives//html/TenTec/2015-02/msg00135.html (11,151 bytes)

6. Re: [TenTec] 252mo supply (score: 1)
Author: Chris Howard w0ep <w0ep@w0ep.us>
Date: Thu, 26 Feb 2015 13:23:29 -0600
It was pointed out to me that I should have used a 2n5301 or 2n6258. I'm going to go through my junkbox and see if I have any of those. Chris _______________________________________________ TenTec ma
/archives//html/TenTec/2015-02/msg00136.html (11,488 bytes)

7. Re: [TenTec] 252Mo supply (score: 1)
Author: Douglas via TenTec <tentec@contesting.com>
Date: Thu, 26 Feb 2015 13:12:58 -0800
I'd not use a 2N3055 substitute for a pass transistor in the 252M supply. The 2N3055 only has a collector current rating of 15 amps. There are better subs out there with higher ratings. I believe the
/archives//html/TenTec/2015-02/msg00137.html (15,913 bytes)

8. Re: [TenTec] 252Mo supply (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Thu, 26 Feb 2015 23:33:21 +0100
I'm always amazed to see people running power supplies without a crowbar. This is about as dangerous as driving on "slicks" in a snow storm and not wearing your seat belt. A crowbar is a dirt simple
/archives//html/TenTec/2015-02/msg00138.html (17,721 bytes)

9. Re: [TenTec] 252Mo supply (score: 1)
Author: "Bill ACITO, W1PA" <w1pa@hotmail.com>
Date: Thu, 26 Feb 2015 17:50:03 -0500
With my 540, I got a 262G that has two TO-3 pass transistors... they are marked: S S S PR216M (actually, based on mounting holes on the heatsink, it looks like there was originally one, and then it w
/archives//html/TenTec/2015-02/msg00139.html (8,526 bytes)

10. Re: [TenTec] 252Mo supply (score: 1)
Author: Al Gulseth <wb5jnc@centurytel.net>
Date: Thu, 26 Feb 2015 16:53:43 -0600
TT did make an optional crowbar board for the 252/262 etc. supplies. As I recall (my dad had several 252s over the years) it was a board that mounted inside the back panel of the PS and should be pre
/archives//html/TenTec/2015-02/msg00140.html (20,333 bytes)

11. Re: [TenTec] 252Mo supply (score: 1)
Author: "Bill ACITO, W1PA" <w1pa@hotmail.com>
Date: Thu, 26 Feb 2015 18:16:07 -0500
I love the multi-power-resistor ammeter shunt wrapped around the heatsink, btw. hmmmm.... I take it back. I googled pictures of the 262G and I don't see any other units with them. That may not be the
/archives//html/TenTec/2015-02/msg00141.html (9,054 bytes)

12. Re: [TenTec] 252Mo supply (score: 1)
Author: Clayton Brantley via TenTec <tentec@contesting.com>
Date: Thu, 26 Feb 2015 23:22:38 +0000 (UTC)
Rick:  Looked at your homebrew PS and it's almost the same as the one I have here.  I use a 30 ampdarlington pass transistor and the 7815 drives the base of the pass transistor.  The "crowbar" is sim
/archives//html/TenTec/2015-02/msg00142.html (19,709 bytes)

13. Re: [TenTec] 252Mo supply (score: 1)
Author: "Bill ACITO, W1PA" <w1pa@hotmail.com>
Date: Thu, 26 Feb 2015 18:29:39 -0500
NO EXCUSES, PEOPLE! If you do not have a crowbar on your power supply, add one! Big time agree. Direct personal experience here... my first Ten Tec was an Omni-A bought new circa 1980 by my father (I
/archives//html/TenTec/2015-02/msg00143.html (8,985 bytes)

14. Re: [TenTec] 252Mo supply (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Fri, 27 Feb 2015 11:12:44 +0100
Sounds very good, clayton. Also very simple circuit. Survival on a mountaintop is really quite a feat. Mine only saw room temperature for 35 years. Back in 1980 when I built mine, I had just bought a
/archives//html/TenTec/2015-02/msg00146.html (21,006 bytes)

15. Re: [TenTec] 252Mo supply (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Fri, 27 Feb 2015 11:19:16 +0100
Well I wasn't born this smart, Bill. Guess how I learned! Luckily it was on a 2m handy-talkie and not an hf transceiver. I was using a borrowed P.S. at a portable QTH and its pass transistor blew. I
/archives//html/TenTec/2015-02/msg00147.html (10,039 bytes)

16. Re: [TenTec] 252Mo supply (score: 1)
Author: Clayton Brantley via TenTec <tentec@contesting.com>
Date: Fri, 27 Feb 2015 19:44:37 +0000 (UTC)
Rick:  I doubt it would blow up that quick!  HI.  We used a toroid transformer that was Xerox surplus.They had two types and ours were the 14 volt versions.  There was a 24 volt version too.  The pow
/archives//html/TenTec/2015-02/msg00149.html (22,529 bytes)

17. Re: [TenTec] 252Mo supply (score: 1)
Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
Date: Sat, 28 Feb 2015 01:26:18 +0100
EXACTLY! Funny, we have the same thing here now in my club. Our repeater is on top of a mountain near my QTH, inside of a little aluminum box. No heat in the winter, no air condx in the summer. It mu
/archives//html/TenTec/2015-02/msg00153.html (23,743 bytes)

18. Re: [TenTec] 252mo supply (score: 1)
Author: Chris Howard w0ep <w0ep@w0ep.us>
Date: Sun, 31 Jan 2016 20:58:25 -0600
Follow-up on this old power supply issue from a year ago... I had the 2n3055 in there as the main pass transistor for just under a year. I usually operate QRP, turned down to 5 watts. Things seemed t
/archives//html/TenTec/2016-01/msg00468.html (12,961 bytes)

19. Re: [TenTec] 252mo supply (score: 1)
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 31 Jan 2016 21:19:34 -0600
The transistor you selected should work fine but for the fact that the 2N5201 has higher gain. It is possible that your supply could be in oscillation as a result. Why did you pick the 2N5201? The 2N
/archives//html/TenTec/2016-01/msg00469.html (15,149 bytes)

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