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

[Al Parker]

Hi Nick,
	Tony is a good resource, he probably has more R-1051 and related stuff 
than anyone.  8-10 yrs ago he offered to loan me a manual (which I 
accepted), and when I got out of "them" I sold him what was left.  He 
came to RARSfest to pick it up, 2-3 yrs ago.
	<http://www.boatanchors.org/R-1051.htm> has a .pdf that might help to 
define some model differences to you, but that's about all I have, 
online at least.  Still have (I think) some paper manuals if that'd be 
of any help.
	Separate subject, I'll try to remember to bring you that SP-600 bezel 
at Benson.
(Yes, 6-pack is a common term, this guy must be new at it.)
	Cecil Acuff used to be the guy who could troubleshoot and fix 6-packs, 
but he quit it 4-5 yrs ago, don't know who he sold his stuff to, but you 
could ask him, chacuff at cableone.net  I keep in touch with him regularly.
73,

Al


On 10/19/2014 12:28 PM, Nick England 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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