>
>
>> Any of you fellas ever apply these to a project for amateur amplification?
>> Is
>> there any disadvantage to the 26.5 volts on the heater, or does it just
>> heat
>> quicker? Not much info on Rell's page via Richardson's Electronics. Let me
>>
>> know.
>> Paul...N2TZV
>>
> [Steve Katz] The advantage of 4CX350Fs is that they're often found
>new surplus very inexpensively. I've used them for many years, can't tell
>any difference in operation between the 350F and a 250B, and never had to
>perform any circuit alterations other than the filament transformer. I
>don't recall the 350F heating up any quicker than a 250B -- and I always
>used a 120 second timer to assure warmup prior to hitting the tube with
>drive, plate or screen voltage. -WB2WIK/6
>
** a friend who worked at Eimac said an extra half-minute was better.
- Rich..., 805.386.3734, www.vcnet.com/measures.
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