[AMRadio] Question: What rigs used the 4-400A ?

[Mel Farrer]

OK, the Bauer 707 broadcast transmitter I use on 75 M AM uses a pair of Eimac 4-400C in parallel in the final and a pair of Amperex graphite plate ones P-P in the modulator.

Mel, K6KBE



________________________________
 From: James R. La Frieda <lafrieda at earthlink.net>
To: amradio at mailman.qth.net 
Sent: Tuesday, April 2, 2013 3:46 PM
Subject: Re: [AMRadio] Question: What rigs used the 4-400A ?
 
One of my boat anchors, viz.a *Viking Thunderbolt *Linear Amplifier 
(with 2000 W PEP, 1000 watts CW, and 750 W AM)*uses a pair of 4-400A  
tetrodes in parallel,* that are bridge neutralized.

Jim
N6MV



On 4/2/2013 1:20 PM, Jim Wilhite wrote:
> Globe King 500 series uses them.  They came in the B and C model 
> depending on what was in stock.  The A model and the one with no 
> suffix came with the 4-250 but people switched to the 4-400.
>
> Jim
> W5JO
>
> ----- Original Message -----
>
>
>> Does anyone have a list of ham radios that used the 4-400A tube?
>> TIA, John W5JV
>>
>
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