[Amps] Ameritron AL-1500 Problem

[Fortra]

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 at mail.telepac.pt>
To: "Keith Dutson" <kdutson at sbcglobal.net>; <amps at 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 at sbcglobal.net>
> To: <amps at 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 at contesting.com [mailto:amps-bounces at contesting.com] On
>> Behalf Of Jose E. Ribeiro Sa
>> Sent: Wednesday, October 05, 2005 8:19 AM
>> To: amps at 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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