[Amps] GS35B Amps Common Problem / few more comments

[Alek Petkovic]

A taller cabinet and I would suggest a heftier blower.

73, Alek.
VK6APK

On 7/11/2019 5:48 AM, Steve London wrote:
> Okay....I'll be stupid....
>
> Besides the filament voltage and socket, what else would it take to 
> convert something like a 3 tube Alpha 76 to a single 8877 ? Seems like 
> the output Z is in the right ballpark.
>
> 73,
> Steve, N2IC
>
> On 11/06/2019 02:26 PM, Jim wrote:
>> Agreed! 8877 is one the the BEST tubes for ham radio.
>>
>> LOTS of them out there and available. Hams bought many of them for 
>> spares that never got used; Because the 8877 was such a robust tube. 
>> Most 8877 tubes got babied... Except for contesting... But there is 
>> testimonial from K3LR's large and busy contest station below. So even 
>> in a contesting environment, the 8877 goes STRONG!
>>
>> 8877/3CX1500A7 hard to beat!
>>
>> Thanks
>> 73
>> Jim W7RY
>>
>> On 11/5/2019 8:34 PM, Tim Duffy wrote:
>>> Hello Jim,
>>>
>>> I agree - the 8877 - 3CX1500 is a VERY good Ham Radio tube. I have 
>>> several in service here at K3LR that are 30 years plus years old.
>>> 18 amplifiers here using 8877s that make 1500 watts output RTTY with 
>>> high TX duty cycle - no problem - all the way to 220 MHz!
>>>
>>> The 8877 is an excellent engineered tube for amateur radio - easy to 
>>> build amplifiers with the 3CX1500A7.
>>>
>>> 73
>>> Tim K3LR
>>>
>>> -----Original Message-----
>>> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of MU 4CX250B
>>> Sent: Tuesday, November 5, 2019 9:12 PM
>>> To: Carl
>>> Cc: amps at contesting.com
>>> Subject: Re: [Amps] GS35B Amps Common Problem / few more comments
>>>
>>> You may be a bit harsh, Carl!  I’ve lost two 8877s  in the past half
>>> century or so, and it was my fault both times. The first was when I
>>> stupidly let the filament voltage drop way below specs, and the second
>>> was when the blower on my Alpha 9500 failed and I didn’t notice for
>>> two weeks. My workhorse homebrew amp, built in the 1970s, has an Eimac
>>> 8877 with a 1978 date code. Still full output, 4300V on the anode.
>>> 73,
>>> Jim w8zr
>>>
>>> Sent from my iPhone
>>>
>>>> The 8877 is a fragile short life wannabee befitting an oxide 
>>>> cathode tube
>>>>
>>>>
>>>> Carl
>>>>
>>>>
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