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Re: [Amps] Time delay problem with an ALPHA 76 CAE (3tubes).

Subject: Re: [Amps] Time delay problem with an ALPHA 76 CAE (3tubes).
From: "Martin Sole (HS0ZED)" <>
Date: Sat, 13 Dec 2014 09:06:33 +0300
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I've previously had this same problem with such amplifiers. Culprit was always the capacitor associated with the timing circuit going leaky and preventing a full charge to switch the timer circuit.

Replace with a similarly rated electrolytic and the problem will most likely be resolved.

You can prove it first with a voltmeter across the capacitor to observe the charge, or rather lack of.

Martin, HS0ZED

On 13/12/2014 08:15, J.H Mauduit-Larive wrote:

I have an Alpha 76CA #SN 6704 (October 1983). The amp has been stocked for about 10 years! When I press the ON button , the panel meters illuminate amber but do not change to pale green after 60/90s as indicated. Blower starts, HV is normal : 1.5 KV but the meters do not change to green indicating "ready to transmit". This looks like a "time delay" problem. Do you have any suggestion to fix this trouble. Living on Reunion island (Indian ocean) it's very complicated to ship back the radio for repairing... Thanks in advance for your help. Herik, FR5DX.

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