On Oct 5, 2005, at 9:01 AM, Fortra wrote:
> 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.
The heat dam problem caused the 8877's heater to open?
> 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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>
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>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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