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 Post subject: Channel master 6515
PostPosted: Nov Sat 24, 2018 1:19 pm 
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Joined: Jan Tue 05, 2010 1:52 am
Posts: 120
Location: Wisconsin
I just finished recapping this radio and it plays good but the volume control is scratchy. How do I clean this control ? I'm used to working on tube radios with a metal volume control so this is something new.


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 Post subject: Re: Channel master 6515
PostPosted: Nov Sat 24, 2018 4:50 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 13846
I clean controls just as if they were in a tube radio. Many are semi-sealed, working cleaner in around shaft in rear of control that operates the switch seems to give best results. Access is usually biggest problem.

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Tom


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 Post subject: Re: Channel master 6515
PostPosted: Nov Sat 24, 2018 8:33 pm 
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Joined: Jan Tue 05, 2010 1:52 am
Posts: 120
Location: Wisconsin
That worked good, the scratching sound is gone. This radio picks up stations that I’ve never heard before. I have steel siding on my house but that doesn’t seem to matter to this radio!


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 Post subject: Re: Channel master 6515
PostPosted: Nov Sun 25, 2018 5:52 am 
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Joined: Jan Sun 06, 2008 3:28 am
Posts: 4318
Location: Richmond, VA
The 6515 “Super Fringe” is noted for its ability to pull in distant stations, and it’s a good looking radio, too. The Channel Master transistor radios were made in Japan by Sanyo.

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 Post subject: Re: Channel master 6515
PostPosted: Nov Sun 25, 2018 5:45 pm 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 6033
Location: Indianapolis, IN
Glad you have it working well !

They are excellent radios and as Ed said, good looking too...

John


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 Post subject: Re: Channel master 6515
PostPosted: Nov Sun 25, 2018 8:41 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 32408
Location: SoCal, 91387
I have one. They are more like a small table set than a pocket portable, and the dial looks like the face of a clock, sorta. The four Transistors in the RF stage, including the RF amp, and the four in the audio stage, along with the lengthy antenna ferrite core, make for a good DX machine!

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 Post subject: Re: Channel master 6515
PostPosted: Nov Fri 30, 2018 1:02 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 6449
Location: Black Hills, SD 57745
Great audio tone is my favorite feature of the 6515. It's my go-to set these days. All I had to do with mine was tweak the trimmers and clean the volume. It's working fine with original caps, nothing at all has been replaced, though the tuning cap is scratchy. Not a huge issue as I mostly use it to listen to just a few local stations or my transmitters, all of which reside on the upper half of the dial where it's not noisy.

I use still-serviceable nicads salvaged from failed drill-driver battery packs for power. They'll run it a month or two between recharges. Too bad the 6515's case is so often cracked, chipped or has a dented grille. Mine is no exception. It's a user set, not a collectible. Which suits me fine!
-Ed

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 Post subject: Re: Channel master 6515
PostPosted: Dec Wed 05, 2018 5:54 am 
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Joined: Aug Wed 19, 2009 1:33 am
Posts: 193
In the beggining my radio had a normal sensitivity so I changed all electrolytic capacitors and noted an improvement in reception so good that I went ahead and changed ALL capacitors and then the radio became extremely hot like not other radio I've seen before, inclusive better than my Panasonic RF2200.
After changing all capacitors it was neccesary to align ,again, all the IF transformers, making them "peaky"
I strongly recommend changing ALL capacitors.


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 Post subject: Re: Channel master 6515
PostPosted: Dec Sat 08, 2018 3:46 am 
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Joined: Jan Tue 05, 2010 1:52 am
Posts: 120
Location: Wisconsin
I replaced all 10 caps in this radio and it really woke up. I’m picking up a few stations that my GE superadio 2 barely receives. There appears to be a station at nearly every position on the dial!


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 Post subject: Re: Channel master 6515
PostPosted: Dec Sat 08, 2018 5:53 am 
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Joined: Aug Wed 24, 2011 4:35 am
Posts: 4464
Location: Sunnyvale CA
Tucker wrote:
I replaced all 10 caps in this radio and it really woke up. I’m picking up a few stations that my GE superadio 2 barely receives. There appears to be a station at nearly every position on the dial!


The gray or orange plastic Japanese electrolytics are almost always bad, and have a much higher failure rate than US capacitors of the same era.

I am very happy with my 6515, it's a very high quality product with outstanding performance, and not nearly the pain in the rear end that some of it's Japanese compatriots to work on.

Brett


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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 4:07 am 
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Joined: Aug Sat 27, 2011 1:59 am
Posts: 158
Location: Kansas City area
I've got a 6515 headed my way! :) All the links to schematics I've come across are broken. Can any of you guys point me towards a schematic?

Brian


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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 4:46 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 32408
Location: SoCal, 91387
You don't need the print in order to swap out the Electrolytics, but if you run into trouble, PM your email addy, and I'll send it to ya.

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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 5:05 am 
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Joined: Aug Sat 27, 2011 1:59 am
Posts: 158
Location: Kansas City area
Ok, thanks fifties!


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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 2:14 pm 
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Joined: Sep Fri 07, 2007 2:27 am
Posts: 6085
Location: Grand Chute, Wisconsin
Blast wrote:
Can any of you guys point me towards a schematic?

Brian

I've got some of the Sams here: https://www.dropbox.com/sh/dhpmmpgjxo3i ... xOrua?dl=0

.


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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 2:25 pm 
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Joined: Aug Sat 27, 2011 1:59 am
Posts: 158
Location: Kansas City area
Beautiful! Thank you very much!

Brian


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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 6:28 pm 
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Joined: Feb Thu 08, 2007 2:32 pm
Posts: 12539
Location: 06457
Best bang for the buck next to the GE Superadio for performance. :)


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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 7:37 pm 
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Joined: Aug Sat 27, 2011 1:59 am
Posts: 158
Location: Kansas City area
Nice! Well, this was given to me but I paid the $13 shipping plus $10 for his trouble. He said it turns on but doesn’t have any output so I’m looking forward to getting a project soon!


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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 7:55 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 32408
Location: SoCal, 91387
Most likely simply changing the 4 E-caps should get it singing again.

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 Post subject: Re: Channel master 6515
PostPosted: Apr Wed 03, 2019 8:51 pm 
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Joined: Aug Sat 27, 2011 1:59 am
Posts: 158
Location: Kansas City area
Yes, that’s what I’m getting from the many threads I’ve found on the subject. I’ve got them all in stock. It’s going to be the first go for the homemade ESR meter (Alan Wolke spec) I just made:


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File comment: ESR Meter
F8EC7516-C15F-4D59-ADE9-E2FCECBB5BA5.jpeg
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 Post subject: Re: Channel master 6515
PostPosted: Apr Thu 04, 2019 2:34 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 6033
Location: Indianapolis, IN
As you've heard, they're excellent radios...

Looking forward to your ESR report on the many electrolytics !

John


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