[Amps] 4CX250 IMD

[Steve Thompson]

jeremy-ca wrote:
> 
> ----- Original Message ----- From: "Steve Thompson" <g8gsq at eltac.co.uk>
> To: <amps at contesting.com>
> Sent: Friday, September 28, 2007 2:30 AM
> Subject: Re: [Amps] 4CX250 IMD
> 
> 
>> jeremy-ca wrote:
>>> According to my full size Eimac manual ( the yellow one with the multi
>>> page spec loose leaf sheets) the only 4CX250 style tube with decent IMD
>>> is the 4CX250R/7580 which was used in a lot of military equipment
>>> including the AN/URC-32 that I worked on in the USN.
>>>
>>> At Ep of 1500 in AB1 3rd/5th is -30/35. However at 2000V it slips to
>>> -23/27.
>>
>> At what power and efficiency?
>>
>> Steve
>>
> 
> 250/245 ma and 262/470 W PEP Note they specify PEP. There is also a 
> "worst case" 3rd order line entry of -29/21dB.

Single tube or pair?

Thanks, Steve