[Drake] TR-7 problems

[Transmaster]

Can somebody sent me, or direct me to,  a hi rez photo of the area of
the parent board where 10R and a10T busses are, and the Q306, and Q307
on the exciter board. My manual is a downloaded copy and the photo's
are just black blots on the page. What is the modern part numbers of
Q306, and 307.

Big time thanks in advance
Ken

On 2/13/07, Garey Barrell <k4oah at mindspring.com> wrote:
> Ken -
>
> Check the 10R and 10T busses.  Marked on the bottom of the "parent board".
>
> 10R should be very near +10V in Receive and 0 in Transmit.
>
> 10T should be very near +10V in Transmit and 0 in Receive.
>
> I suspect you might find that 10R is +10 in both!  If this is the
> problem, check the 10R and 10T "fuses" (cleverly disguised as
> transistors) at Q306 and Q307 and located on the Transmit Exciter
> board.  (Where else?!?)
>
> 73, Garey - K4OAH
> Atlanta
>
> Drake 2-B, 4-B & C-Line Service Supplement CDs
> <www.k4oah.com>
>
>
>
> Transmaster wrote:
> > Well I finally got the TR-7 fired up and it has a serious problem in
> > the transmitter.
> > When I key i t it sounds like it is in some demonic digital mode. It
> > is a staccato high pitched tone "dee-dee-dee" you can hear my voice in
> > the background but it is totally unintelligible. If this was a vacuum
> > tube transmitter I would say there is RF getting into something but
> > being solid state I don't really know.  I am not set up for DX'ing
> > solid state gear.  What kind of test equipment do I need to add to my
> > collection to work on this rig?  I have the usual VTVM's, digital
> > multi-meters, O scopes, tube testers, RF/audio signal generators, etc
> >
> > Ken de W7ITC
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-- 
Kenneth A. Crips, W7ITC Home of the Chew Crew,  Red Headed
Irish Terrier House Ninjas, Chic', and Cowboy
10th degree black belts in Mouch Fue, Bed Fue, and
Con Artist Fue.