Jeff,
Keep me in mind should you decide that you need to lighten up your shelf...
>> > The RF power transistors are listed as "Factory Select".
>> > Do you know what the mfgr and part no. is or what would work?
>> > Thanks
>> > Gene
>> > WA2IJE
>>
>> Probably some Motorola MRF-xxx type equivalent. I'd probably use
>> a Motorola RF Transistor Data Book to look for a matching power
>> level and case style. I'd also need to know how many stages
>> are in the amplifier...? ... direct drive of 2 output transistors
>> or if there's a single or dual predriver stage before the
>> final sections.
>
> I have a new (well, it's been sitting on the shelf for a few years) TPL
> RXR
> series 220 amp here. It uses an MRF-646 driving a pair of MRF-648's.
> This
> is the same configuration as used in their UHF amps that take 8-15 watts
> in
> for 70-100 watts out (though obviously with different component values and
> microstrip Z/geometry). Obviously, at the lower frequency, the gain is
> higher - this one is labeled 5 in for 100 out.
>
> --- Jeff
>
> --------------------------------------------
> Jeff DePolo WN3A - [EMAIL PROTECTED]
> Broadcast and Communications Consultant
>
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