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  #1  
Old 05-13-2016, 10:46 AM
Captainclock Captainclock is offline
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KLH Model 21 found at Goodwill today!

Hello everyone today I found at Goodwill (work) a KLH Model 21 on the shelf in the electronics section in the store its kind of in rough shape as its missing the bass control knob and the grille cloth is coming loose and its got some lavander colored paint splatters on it but I figure for $7.99 one couldn't go wrong with such a classic piece of electronics history. So anyways I would like to know a little more about this unit as far as when it was made and a little bit about how it works and also as to where I could get a replacement knob for the bass control and how I could go about cleaning up the paint spatters on the unit. Any help and information would be appreciated.

Thanks,

Levi

Pictures are posted below.
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File Type: jpg DSCN2814.jpg (130.5 KB, 36 views)
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  #2  
Old 05-13-2016, 11:07 AM
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Ed in Tx Ed in Tx is offline
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I Google-searched it and found 7,840 results. Including one on Shopgoodwill com that sold for $60. You got a nice employee discount!
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Old 05-13-2016, 11:21 AM
Captainclock Captainclock is offline
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Quote:
Originally Posted by Ed in Tx View Post
I Google-searched it and found 7,840 results. Including one on Shopgoodwill com that sold for $60. You got a nice employee discount!
Thanks, and yeah I thought so too. I plugged it in to try it out and it seemed to be just a 60 hz. hum coming out of the speaker and no reception on the tuner so I'm guessing that the filter capacitor needs to be replaced at least, which is a 2000 MFD 30V electrolytic capacitor. As for the grille cloth it looks like it should be fairly easy to repair it. When I opened it up it looked like i was the first one to ever open the unit up as it still had its sound dampening pillow inside the case yet and it was pretty clean inside hardly a spec of dust inside the unit.
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Old 05-13-2016, 11:36 AM
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I have used a product called "goof off" successfully to remove latex paint splatters without damaging the underlying wood finish on older radios... I suspect that it would work ok on the KLH.

jt
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Old 05-13-2016, 11:55 AM
Captainclock Captainclock is offline
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Originally Posted by jr_tech View Post
I have used a product called "goof off" successfully to remove latex paint splatters without damaging the underlying wood finish on older radios... I suspect that it would work ok on the KLH.

jt
Alright, I'll see about picking up a bottle of that. The only problem is that there's some paint spatters on one of the knobs as well and I tried scratching it off with my fingernail and it wouldn't come off and I know goof-off isn't going to be good to use on something like plastic because it has stuff in it that hard on plastic, so I wonder what I would use on the knobs to clean them up.
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Old 05-13-2016, 01:09 PM
WISCOJIM WISCOJIM is offline
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Try the new Goof Off 2. "SAFE ON PLASTIC!"

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Old 05-13-2016, 08:55 PM
WISCOJIM WISCOJIM is offline
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Try the link again. Perhaps the download is a bit slow, but it works fine here.

http://antiqueradio.org/art/KLH21ServiceManual.pdf

.
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  #8  
Old 05-13-2016, 08:59 PM
Captainclock Captainclock is offline
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Originally Posted by WISCOJIM View Post
Try the link again. Perhaps the download is a bit slow, but it works fine here.

http://antiqueradio.org/art/KLH21ServiceManual.pdf

.
It would download but nothing would show up as far as pictures or images go, it was just a blank grey page.
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Old 05-13-2016, 09:02 PM
WISCOJIM WISCOJIM is offline
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It's a 27-page PDF file. Must be some trouble on your end.

.
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Old 05-13-2016, 10:07 PM
Captainclock Captainclock is offline
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Originally Posted by WISCOJIM View Post
It's a 27-page PDF file. Must be some trouble on your end.

.
Yeah it will let me navigate through the pages but the printed pages themselves aren't showing up in the PDF Download. So I'm not sure what's going on.
So I figured out that it must of been my Adobe Reader plugin on my web browser that was screwing things up because when I downloaded the file onto my computer and then opened it with Adobe Reader on my Computer it worked fine.

Last edited by Captainclock; 05-13-2016 at 10:15 PM.
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Old 05-13-2016, 09:24 PM
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The link works for me. Might want to try right clicking and choosing 'Save Link as'. Takes forever for my browser to open the PDF if I simply open the link.
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  #12  
Old 05-13-2016, 09:33 PM
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Link akso works fine for me... but here is another resource from AK:

http://akdatabase.org/AKview/display...album=35&pos=0

jr
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  #13  
Old 05-14-2016, 12:22 PM
WISCOJIM WISCOJIM is offline
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There are multiple version and revisions of the Twenty-One.

From the looks of his, it's probably one of the early (non-IC) versions.

Pictures of the boards inside his unit could confirm this.

.
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  #14  
Old 05-14-2016, 12:32 PM
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Interesting! thanks for the info... guess we need some chassis pix.

jr
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  #15  
Old 05-14-2016, 12:34 PM
Captainclock Captainclock is offline
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Here's some pictures of the insides of the unit.

First picture is of the tuner board, second picture is of the IF board, third picture is of the amplifier board.
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File Type: jpg DSCN2815.jpg (81.2 KB, 25 views)
File Type: jpg DSCN2816.jpg (79.4 KB, 29 views)
File Type: jpg DSCN2817.jpg (100.5 KB, 30 views)
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