Hi Jose,
the problem you have described remind me about similar case waaay back in
80's. Our Alpha 77dx did the same thing on several occasions. It was find
later after removal from the socket and replacement with new one, that the
connection between the heater internally was void. If you shake the tube it
will show the connection red on multimeter. Quite some years has elapsed
since we learned that EIMAC did have some bad batch of tubes. Our amp was
produced in 1980. Yeah, there are some weird stories how you can literally
weld the heater connection back, using AC in series with bulb but I honestly
do not recomended. Jose, swallow up and buy the GS35B. The rest it stayed,
could be used to entertain your partner!!
Best regards,
nermin S58DX
----- Original Message -----
From: "Jose E. Ribeiro Sa" <zemurtosa@mail.telepac.pt>
To: "Keith Dutson" <kdutson@sbcglobal.net>; <amps@contesting.com>
Sent: Wednesday, October 05, 2005 4:09 PM
Subject: Re: [Amps] Ameritron AL-1500 Problem
> Thank you Keith
> Yes I just tested it with a second tranceiver and its the same.
>
>
> 73 Jose CT1EEB
>
> ----- Original Message -----
> From: "Keith Dutson" <kdutson@sbcglobal.net>
> To: <amps@contesting.com>
> Sent: Wednesday, October 05, 2005 1:31 PM
> Subject: Re: [Amps] Ameritron AL-1500 Problem
>
>
>> Sounds like a TR relay problem, such as sticking or intermittent ground.
>> Have you checked the TR connection from the transceiver? Do you have a
>> second transceiver? If so, does the problem continue with the other
>> transceiver?
>>
>> 73, Keith NM5G
>>
>> -----Original Message-----
>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>> Behalf Of Jose E. Ribeiro Sa
>> Sent: Wednesday, October 05, 2005 8:19 AM
>> To: amps@contesting.com
>> Subject: [Amps] Ameritron AL-1500 Problem
>>
>> Good afternoon
>> Maybe some of you can give me a clue about this problem Iam experiencing
>> with my Ameritron AL-1500 amp.
>>
>> A couple of days ago I switched on the AL-1500 and when I started TXing
>> there was no output power at all (zero watt), the HV was OK (3300 Volts),
>> but no IP and power mesurements in the meter. Theres an ALC reading.
>>
>> I thought in could be some kind of bad contact in the 8877 lamp so I took
>> it
>> off cleaned the lamp socket metal contacts put in on again and the Linear
>> amp. was working ok at full power. === so far so good ===
>>
>> Next day when I turned it on is WAS NOT TXing again, the problem was
>> still
>> there but after some tries the amplifier started transmitting at full
>> power
>> again and worked all day long.
>>
>> This morning again the same, but this time its not transmitting at all, I
>> tried to to see if I could detect any malfunction but nothing, all seems
>> OK,
>> the amp. seems to be working ok, but no Power out no matter what I do.
>> I also noticed that the impedance between the radio and the amp has
>> changed
>> because SWR in the radio is way too high (and before the match was
>> perfect
>> without SWR).
>>
>> I will apreciate your feedback and ideas about what might be originating
>> this problem.
>>
>> 73 Jose CT1EEB
>>
>>
>>
>>
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>
>
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