[Boatanchors] RME-69 'lytic replacement

[Bill Stewart]

Thanks Tom for describing the situation better than I did. I guess the boys at RME didn't expect the radios to outlast some of the parts. My orig. thinking was that this large, tall and square can would be an easy re-stuff project. However, after more consideration it's really not worth the trouble. I'm not a purist so hanging the separate 'lytics under the chassis is no problem for me. I have the 'lytics in stock, so its just a matter of tracing down the wiring thru the harnesses...which is still a bit of a pain. Most of the harnesses are hidden under the bandswitch assembly. 

I had already changed the 20uf when I did the previous recapping job...just didn't do the big 'lytic.

Thanks for the great advice.
73 de Bill K4JYS
  
----- Original Message -----
From: "Tom NØJMY" <n0jmy at hayseedhamfest.com>
To: "Bill Stewart" <cwopr at embarqmail.com>
Cc: "boatanchors" <boatanchors at mailman.qth.net>
Sent: Tuesday, March 23, 2010 8:06:31 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Boatanchors] RME-69 'lytic replacement

Hiya, Bill.  I'm not sure some of the folks that have replied to you 
realize what your up against with that RME-69, i.e. that it's got a 
potted square can that is a real mother-bear to get out.  The 
installation of that dude must have been one of the very first steps on 
the assembly line, and what came later made the mounting nuts completely 
inaccessible, without taking half the radio apart, IIRC.

I vote with the fellows that suggest installing some "discreet 
discretes" under the chassis, unless you just relish the challenge.  A 
couple of 10 uF @ 450V's, and whatever you can come up with that's close 
to a 12 uF @ 450V (probably another 10 uF will be well within the old 
tolerance).

While your at it, there's probably a low voltage electrolytic (around 10 
or 20 uF @ 25 to 50 volts) around the output amp somewhere for the 
cathode bias.  An old guy like that probably needs replaced, too.

Good luck with that rig.  The RME that doesn't look like an RME, hi HI!

73,
Tom


Bill Stewart wrote:
> Hi Dennis,
> Yes, thats what I will do if I can't get the can out. However, the can would be a great candidate for re-stuffing if I can get it out w/o having to take out parts of the bandswitching coils.... Thanks, Bill
> 
> ----- Original Message -----
> From: "mac" <w7qho at aol.com>
> To: "Bill Stewart" <cwopr at embarqmail.com>
> Cc: "boatanchors" <boatanchors at mailman.qth.net>
> Sent: Tuesday, March 23, 2010 11:47:12 AM GMT -05:00 US/Canada Eastern
> Subject: Re: [Boatanchors] RME-69 'lytic replacement
> 
> You might consider sneaking individual modern replacements under the  
> chassis, leaving the can in place to preserve the above chassis  
> appearance.
> 
> Dennis D. W7QHO
> Glendale, CA
> 
> 
> 
> On Mar 23, 2010, at 8:05 AM, Bill Stewart wrote:
> 
>>
>>
>>
>> Has anyone replaced or re-stuffed the can electrolytic condenser  
>> C34, C35 & C23, which are all in the same can. Looks to be held in  
>> by two tab screws on the can, but the nuts are under a band switch  
>> coil can. It looks like a major job to remove it, if re-stuffing is  
>> desired. Any pointers?
>>
>> Thanks, Bill K4JYS
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