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References: [ +from:n4elm@bellsouth.net: 27 ]

Total 27 documents matching your query.

21. Re: [TenTec] Need 509 schematic (score: 1)
Author: William Redfearn <n4elm@bellsouth.net>
Date: Wed, 26 Feb 2020 19:30:53 +0000 (UTC)
I think Jim would need the 509 schematic to see how the connections for the 208 are wired in.I have the 509 PDF from the TT obsolete manuals site.  I have a PDF of the 208A manual if anyone needs tha
/archives//html/TenTec/2020-02/msg00098.html (7,158 bytes)

22. Re: [TenTec] WTB (Ten Tec Scout frequency jump) (score: 1)
Author: William Redfearn <n4elm@bellsouth.net>
Date: Tue, 2 Jun 2020 16:26:11 +0000 (UTC)
Its been a while since I had a Scout & Argo but I seem to remember that using an external keyer reduced or eliminated the drift effect. 73 - Dave, N4ELM ______________________________________________
/archives//html/TenTec/2020-06/msg00009.html (6,958 bytes)

23. Re: [TenTec] Argosy 2 (score: 1)
Author: William Redfearn <n4elm@bellsouth.net>
Date: Wed, 10 Jun 2020 23:43:40 +0000 (UTC)
Snowy, Since CW is working, you're definitely looking in the right area.You should be able to use a scope to look at the audio signal through both both sections of U2 into the balanced modulator (U1)
/archives//html/TenTec/2020-06/msg00026.html (7,112 bytes)

24. Re: [TenTec] Argosy 2 (score: 1)
Author: William Redfearn <n4elm@bellsouth.net>
Date: Thu, 11 Jun 2020 17:59:44 +0000 (UTC)
Well, that's different :-) If U1, pin 1 is <3 volts in other than CW mode, take a look at Q4. If Q4 is turned on (by the CWU line) or shorted, U1, pin 3 will be grounded thru D2 & R15 which unbalance
/archives//html/TenTec/2020-06/msg00031.html (8,715 bytes)

25. Re: [TenTec] Century 22 (Josh Gibbs) (score: 1)
Author: William Redfearn <n4elm@bellsouth.net>
Date: Thu, 18 Jun 2020 18:31:38 +0000 (UTC)
The PTO shaft is not grounded so a small frequency shift occurs when your hand gets close to the dial & dial skirt.One mod was to use a cut down safety pin to short out the shaft as it passes through
/archives//html/TenTec/2020-06/msg00071.html (7,155 bytes)

26. [TenTec] TT Argonaut 509 Control board? (score: 1)
Author: William Redfearn <n4elm@bellsouth.net>
Date: Sun, 26 Jul 2020 01:08:10 +0000 (UTC)
I'm looking for a 90192 Control board for a TT 509. Apparently this is a very early one as it does not match my other 509 or the manual. The problem is the 8 volt power supply section is dropping to
/archives//html/TenTec/2020-07/msg00043.html (7,720 bytes)

27. Re: [TenTec] Model 509 Parts Unit (Dale Hardin) (score: 1)
Author: William Redfearn <n4elm@bellsouth.net>
Date: Mon, 10 Aug 2020 17:58:50 +0000 (UTC)
Dale, I don't currently have a parts unit but I am working on a couple of 509s right now. Do you have a mechanical problem or electrical problem? 73 - Dave, N4ELM <Previous>   1. Model 509 Parts Unit
/archives//html/TenTec/2020-08/msg00017.html (6,910 bytes)

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