[Boatanchors] Acquired a 'dream rig' Collins 51j-4

[W2HX]

Thanks, Al. Yes I still have it! It is currently mated with a Collins 30K-4
https://w2hx.com/x/Collins/30K-4/Pix/30K-4-Station.jpg

Hope you are doing well, Al!

73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/c/w2hx-channel/videos

-----Original Message-----
From: Al Parker <anchor at ec.rr.com> 
Sent: Friday, June 3, 2022 4:26 PM
To: Karel Jennings <karel at alberta02.com>; W2HX <w2hx at w2hx.com>
Cc: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Acquired a 'dream rig' Collins 51j-4

Hi Karel, Eugene, et al,
	I installed the Lankford version of the prod. det. in Eugene's 51J-4, and several others.  Glad to hear you still have the rcvr, Eugene.  It's not a hard job, but does require some "custom attn" as noted in my notes and Dallas' on the att. schematic. I know the skem won't go thru the reflector, but anyone who would like a cc, just ask.
	The original info from Lankford was in Hollow State News edn 28, I've att. a cc of that also.
	I did have some pix on my BA website, but a lot of that has disappeared thru the yrs due to various HD & server issues.  I will look some more tonite to see if I can find them, IIRC there's a good one showing the front panel switch & cabling, plus some good closeups inside.  If I'm successful, I'll cc them to anyone who asks, and maybe I can get them back on the web.  (just found --- orig. article in HSN has those sketches, I think I had taken actual pix.)
	There can be some AGC issues in many of this series rcvr, some component values have changed, and a cupla dipped mica caps have been found to be leaky, causing trouble.  I know I have notes on that stuff in my archives, much from Harry Crespy (anyone remember him).  I'll keep looking for the info.
73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much worth doing as simply messing about in boats"
Ratty, to Mole

On 6/3/2022 2:27 PM, Karel Jennings wrote:
> Excellent, that's a fantastic start, and thank you.
> 
> On Fri., Jun. 3, 2022, 2:07 p.m. W2HX, <w2hx at w2hx.com> wrote:
> 
>> You may want to install a product detector so you can use it with 
>> SSB. As it has a 500 kHz IF you might have a hard time finding an 
>> external product detector but I think treetop circuits might have 
>> something. There is also a Dallas Lankford modification to add SSB to 
>> a 51J4. That is what I have in my 51J4
>>
>> 73 Eugene W2HX
>> Subscribe to my Youtube Channel:
>> https://www.youtube.com/c/w2hx-channel/videos
>>
>>
>>
>> -----Original Message-----
>> From: boatanchors-bounces at mailman.qth.net < 
>> boatanchors-bounces at mailman.qth.net> On Behalf Of Karel Jennings
>> Sent: Friday, June 3, 2022 9:14 AM
>> To: boatanchors at mailman.qth.net
>> Subject: [Boatanchors] Acquired a 'dream rig' Collins 51j-4
>>
>> Well, Thanks to a very good friend in the USA, I just won a Collins 
>> 51J-4 in the Schulman auction.
>>
>> It's intended to be the companion receiver to the Central Electronics 
>> 100V that I'm in the midst of refurbishing.
>>
>> So, I'll do the usual going over the radio etc etc.
>>
>> Is there anything that is a known pain point with these rigs? Like 
>> caps that are known to go bad etc?
>>
>> --Karel VE3KJX
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