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References: [ +from:john@carltonhouse.eclipse.co.uk: 14 ]

Total 14 documents matching your query.

1. [Amps] Acom 1000 and IC746 (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Sat, 23 Apr 2005 21:08:53 -0000
Hello all I have a problem with the above combination. Sometimes the Acom indicates * HOT SWITCHING *. It happens on perhaps 25% of the occasions when I hit the ptt. Any ideas please ? Thanks John G4
/archives//html/Amps/2005-04/msg00465.html (7,232 bytes)

2. Re: [Amps] Acom 1000 and IC746 (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Sat, 23 Apr 2005 21:52:54 -0000
Richard I don't know - that sort of useful information is not in the user manual Hi. But I've just noticed the VOX switch is "in". That may well explain why the problem only sometimes happened (perha
/archives//html/Amps/2005-04/msg00468.html (8,205 bytes)

3. [Amps] TE Systems (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Fri, 22 Sep 2006 07:49:38 -0000
Hi all I'm considering purchasing a UHF s/state amplifier from TE Systems. We have one importer in the UK, and he has quoted me quite a long delivery time. It occurs to me anyway that I may be able t
/archives//html/Amps/2006-09/msg00278.html (6,828 bytes)

4. Re: [Amps] Commander plate voltage readings ? (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Mon, 16 Jul 2007 20:30:56 +0100
Hugh I think you are entirely correct. When I bought a Commander amplifier a few years ago, the first thing I had to do was to replace that chain of resistors. Good luck ! John G4ZTR Is there a known
/archives//html/Amps/2007-07/msg00276.html (7,839 bytes)

5. Re: [Amps] linears and generators (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Tue, 17 Jul 2007 07:29:36 +0100
A while ago I used a modest 12v power supply with a "small generator". It buzzed and hummed a bit which got me thinking and eventually I put a 'scope on the generator output. Any resemblance to a sin
/archives//html/Amps/2007-07/msg00291.html (9,313 bytes)

6. Re: [Amps] UK Transformer manufacturer?? (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Fri, 14 Mar 2008 03:27:37 -0500
Andy Have you looked at what's on offer from Diode Comms ? I'm afraid I know nothing about them, good or bad. If you can find one second-hand, my h/b 2m amplifier uses a transformer from GHP (Gordon
/archives//html/Amps/2008-03/msg00116.html (8,320 bytes)

7. Re: [Amps] HF2500 HV supply... (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Thu, 12 Feb 2009 13:27:37 -0800
Patrick I had a Commander II. I thought the HT voltage was low, but the problem was the voltage divider resistors had changed their value over time, and so the front panel meter was quite inaccurate.
/archives//html/Amps/2009-02/msg00380.html (9,109 bytes)

8. Re: [Amps] Commander HF-1250 problems (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Thu, 16 Jul 2009 16:43:04 +0100
Same problem here with the meter resistors. John G4ZTR Doug, I have an early model Commander amp with a similar HV problem. Turns out they used a type of 1 Meg metering resistors that ages. Over time
/archives//html/Amps/2009-07/msg00202.html (10,208 bytes)

9. Re: [Amps] 144MHz Linear (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Mon, 01 Feb 2010 12:23:42 -0800
Hi Adrian I sure hope no-one local to me buys that amp kit ! "2 x 4CX250B", "1kW" and "linear" don't go together. May be Ok to 600w, but that's about it. Good luck. John G4ZTR --Original Message-- Fr
/archives//html/Amps/2010-02/msg00034.html (10,195 bytes)

10. Re: [Amps] What Is TheOptimum Bias For GS-35b Tubes? (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Thu, 24 Jun 2010 20:26:42 +0100
That sounds like a lot of bias current. I have two commercial amps each with a single tube. They recommend bias at around 100mA and the plate voltage is around 3600. Regards John G4ZTR I have a GS-35
/archives//html/Amps/2010-06/msg00204.html (9,233 bytes)

11. Re: [Amps] Sourcing Sheet Aluminum and Antenna tubing (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Thu, 16 Sep 2010 08:32:24 +0100
Here in the UK, Aluminium Warehouse has very competitive prices and an excellent range of sections. You'll probably need to get together with a few club members to make it worthwhile paying for the d
/archives//html/Amps/2010-09/msg00201.html (10,804 bytes)

12. Re: [Amps] 3CX800A7 Grid Current Problem (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Fri, 27 Jan 2012 11:22:20 -0800
Jim I think something has been lost in the translation ! It is being suggested that you should use a new core, because the old one may have been saturated and/or overheated and it's properties have c
/archives//html/Amps/2012-01/msg00212.html (10,926 bytes)

13. Re: [Amps] 3-500z amp homebrew question (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Sun, 12 Feb 2012 09:53:05 -0800
Mike If you did not understand the reason for that choke, do you think you should be doing any work inside the amplifier ? John G4ZTR The r.f. choke to ground is to prevent the B+ from flowing on the
/archives//html/Amps/2012-02/msg00109.html (10,235 bytes)

14. Re: [Amps] 50v power supply options for SS amps (score: 1)
Author: "John Lemay" <john@carltonhouse.eclipse.co.uk>
Date: Thu, 07 Feb 2013 02:07:52 -0500
Hi Mike I like your SSPA ! How much attention did you pay to its "health and safety" ? The necessary foolproof control and monitoring circuits are putting me off at present. Regards John G4ZTR _____
/archives//html/Amps/2013-02/msg00043.html (15,091 bytes)

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