[Drake] One last thing on the TR7

[John [GM1BSG]]

Ken

The whole service manual is a bit too much to scan but here is some
information that might help.

Just please don't let the information end up on one of these $10 service
manuals rip off CDs.

Service documents should be free!

http://www.gm6nx.com/rld/DRAKE_TR7_BLOCK_GM1BSG.rar

You will have a block diagram, pictures of the main assembly, lower PCB area
and the board interconnects. They are scans of the originals at medium res.

BTW the +10V is very important, a lot of the boards depend on this. Its
worth checking that the connectors are mated OK and that the cards are
getting correct voltages onto them from the mobo before looking too deep.

Like most radios of the era they would not like lying about for too long
unused (watch the electrolytics I had to replace quite a few in mine) and
the open pots used in many locations are subject to ageing also.

Hope it helps.

John 

> -----Original Message-----
> From: drake-bounces at mailman.qth.net 
> [mailto:drake-bounces at mailman.qth.net] On Behalf Of Transmaster
> Sent: Saturday, February 17, 2007 6:15 PM
> To: Drake Listserver ( QTH.NET )
> Subject: [Drake] One last thing on the TR7
> 
> Well the Scope showed all kinds of evil in the carrier of this rig.
> before I disappear into it's innards can one of you supply 
> with a photo of the top and bottom of the TR-7 which names 
> each of the boards.  The photo in my manual is like most of 
> the others a black smug.
> 
> One thing I did notice it seems like one of the boards is a 
> little on the loose side.  looking back to front it is the 
> first full width board.
> 
> As I have already told you I have a TR-7A on it's way which I 
> am told does not light, with what I have learned here and on 
> the TR-7 sites I wonder if the DR-7 board is bad. anyway I 
> have a source of boards maybe I'll get lucky and get one of 
> the two going.
> 
> With what you have told  me here problems I have reported 
> would most likely be found in the AF/IF and or the Exciter 
> boards so I will start there.
> 
> Thanks for your help
> 
> Ken
> 
> --
> 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.
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