PT was one of the prefixes used for TRW RF parts (others were J0 and MRA), some
were
custom parts but the vast majority were for general sale. I can't say I
recognise the
numbers listed but they may be standard parts.
Check out the Motorola RF Devices Data book. Motorola bought TRW some years
back and
most of the range was dropped in favour of Motorola equivalents. However a
good cross
reference exists in the first section of the Motorola book which should help.
I have a
few old TRW data books at work, I will bring them home this weekend and see
what I can
find.
John ZS5JF
----------
> From: Steve Thompson <amps@txrx.demon.co.uk>
> To: Radio WC6W <wc6w@juno.com>
> Cc: amps@contesting.com
> Subject: Re: [AMPS] TRW PT6702 or PT6747?
To: <amps@contesting.com>
> Date: 21 April 1999 11:28
>
>
> In message <19990418.090953.9375.1.WC6W@juno.com>, Radio WC6W
> <wc6w@juno.com> writes
> >
> >Happy Sunday Morning (at least where I am...)
> >
> > Does anyone happen to know the specifications for either the TRW
> >PT6702 or PT6747 RF power transistors?
> >
> > I surmise that they are late 60's vintage VHF parts...
> >
> >73,
> > Marv WC6W
> I think that the PT numbers were mostly customer specific, either in
> testing or for commercial disguise although the actual transistors were
> usually generic types. A few PT parts made it to general sale but these
> numbers don't appear in my US or EU TRW catalogues covering 81-93.
>
> Steve
>
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