[R-1051] Troubleshooting/repairing R-1051 - advice needed

[Tony Snider]

Best advise i can give you is borrow Tonys extender cables

Sent from my iPhone

> On Oct 19, 2014, at 12:28 PM, Nick England <navy.radio at gmail.com> wrote:
> 
> Hi gang. I am just getting my feet wet in working on the R-1051 and would
> like to gather a little knowledge from those more experienced.
> 
> Main question (so far) is how do you troubleshoot and repair a 6-pack? Not
> having a TS-xxxx as the manual recommends, is it common practice to test in
> the receiver with homebrew extender cables made from an old 6-pack? If so,
> where do I get an old 6-pack? If not, what do you recommend?
> 
> Background -
> Actually I am starting with an RT-618A xcvr (part of URC-35A) but it is
> mostly an R-1051 and I have several R-1051's in the garage that'll get
> moved onto the workbench some day. So.....
> 
> First I found and fixed a fair amount of mechanical misalignment in the RF
> turret MHz ring - the LC strip contact blades were whacking and bending the
> fixed contacts (and sliding over or under rather than through, etc.). Same
> problem in the AM-3007 turret. I'm guessing this was the result of someone
> trying to pull out a turret without removing the LC strips first. --  Is
> this a common problem?
> 
> Once I got the turrets all aligned (and fixed some problems in the 28vdc
> supply) and I started testing things, smoke started pouring out of the RF
> turret when I switched to 26MHz - found that the A26 strip had a short
> which was grounding B+. OK, the turret comes apart again and back together
> yet another time. I figure that short was just an odd item.
> 
> The rcvr had very low sensitivity. RF stages checked OK, but some test
> points on the 6-pack weren't showing much of anything on a scope. So I dug
> a -1051D out of the garage and swapped in a 6-pack. Voila - rcvr works fine
> now. But now I need to fix the original 6-pack.
> 
> So, any advice on how to work on this dense collection of circuit boards
> and parts will be greatly appreciated.
> 
> Cheers,
> Nick England K4NYW
> www.navy-radio.com
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