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

Tue Apr 2 20:12:10 EDT 2013

Viking 500

Jerry K1JOS

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of w7fe
Sent: Tuesday, April 02, 2013 19:29
To: Mel Farrer; James R. La Frieda; amradio at mailman.qth.net
Subject: Re: [AMRadio] Question: What rigs used the 4-400A ?

And,  the EFJ Viking Invader 2000. I have a 200, haven't actually touched a 
2000 ... yet.

Stu, W7FE

----- Original Message ----- 
From: "Mel Farrer" <farrerfolks at yahoo.com>
To: "James R. La Frieda" <lafrieda at earthlink.net>; <amradio at mailman.qth.net>
Sent: Tuesday, April 02, 2013 4:03 PM
Subject: Re: [AMRadio] Question: What rigs used the 4-400A ?

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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