WANTED: RCA Receiver radio w/ power supply VHT52W

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audioman23
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WANTED: RCA Receiver radio w/ power supply VHT52W

by audioman23 » Thu Nov 13, 2014 4:40 am

I need to acquire the receiver/radio with the power supply unit from a mid to late 60's RCA console stereo that someone has gutted. The model number of the console stereo that I have is a VHT52W, but I know that this receiver/radio/power supply was used in many other console model numbers. If someone here has one, it does not have to work 100%, but I would prefer one that did. Thanks
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RCA_Stereo_Console_Radio.jpg
RCA Stereo Console Receiver with power supply
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MattTech
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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by MattTech » Thu Nov 13, 2014 4:30 pm

That appears to be an RC-1223C radio chassis, along with the RK-314D power supply.
Missing from the photo is the power amp chassis, an RS-215J.

These three chassis were used in the model VHT52W.

Also used was the record changer, an RP220 series.
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audioman23
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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by audioman23 » Thu Nov 13, 2014 9:47 pm

You are correct with all model numbers for the radio, amplifier & power supply. The amplifier is the lower part of the radio chassis on this configuration and can be separated for repair by removing 4 screws. The problem I am having with mine is when a CD player or tape deck is connected to the TAPE input jacks and receiver selector is set to the tape position, the sound is very distorted, like connecting a CD player or Tape Deck to the Phono section of a pre-amp.
Phono,FM, FM stereo & AM all sound fine. Any ideas as to what the problem is, would be greatly appreciated :?

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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by MattTech » Fri Nov 14, 2014 2:56 am

At the tape input jacks, I've had to install a divider network consisting of two resistors for each channel.
Not having my notes with me (they're at the repair shop) I cannot say what values I used.
But asides from that, every electrolytic on that chassis needs replacement now - every switch needs flushing, trust me, every one I've done for customers needed it, and brought back the original dynamic sound it once had.
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audioman23
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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by audioman23 » Fri Nov 14, 2014 5:18 am

I have replaced all the electrolytic capacitors on the radio and amp boards along with the ( 2) 1500uf and (1) 500uf electrolytics in the power supply about three years ago. I also cleaned and flushed every switch, selector & pot at that same time. All the controls work smoothly and make solid contact. I have a Sam's Photofact for this set-up and it says that the selector switch set to the tape mode makes those 2 RCA jacks on the back of the console an "Input" configuration, when the selector switch is in the Phono, FM Stereo, FM, AM mode, those same 2 RCA jacks become an "Output" configuration. That makes no sense to me. If you had a reel tape recorder at the time, you would need both input and output jacks. I think they should have labeled it a "Tape Head" or "Phono 2" input because of the sensitivity issue. I would appreciate it if you could get me the resistor values for the divider network and a diagram of it if possible. Thanks in advance.

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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by MattTech » Fri Nov 14, 2014 5:27 am

ALL those RCA Victor consoles of that era used "dual purpose" tape jacks.
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audioman23
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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by audioman23 » Fri Nov 14, 2014 5:47 am

It would have been nice if the tape input was originally configured to high level instead of low level input devices

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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by MattTech » Fri Nov 14, 2014 5:32 pm

audioman23 wrote:It would have been nice if the tape input was originally configured to high level instead of low level input devices


It was.
To RCA's equipment.
They tended to be propriatory in design with their products, as some other makers have done at times.
Those 3 pin jacks & plugs, phono cartridges - specifically RCA stuff.
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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by MattTech » Fri Nov 14, 2014 11:14 pm

The line level of today's input devices is around 4-5 times the tolerance level of the preamp in this chassis.
With that said the voltage divider network needs to bleed the excess off.
Two resistors - one being 47K, the other 4.7K should do the trick. (as a starting point)
Put them in series, with the 4.7K end grounded to the ground lug on the jack plate (where the shielded wire attaches to.
The other end, 47K, goes to the hot lug on the appropriate tape jack where the red OR white wires was attached.
Now the red (or white) wire that WAS on that hot lug is soldered to the junction of those two resistors for that channel.
This SHOULD knock the level down to eliminate distorion.
If - not enough, and still distorts, merely UP the value of the 47K to something like 82K, or if not loud enough, to a lesser value like 22K.
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audioman23
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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by audioman23 » Sat Nov 15, 2014 3:17 am

Thank you very much, you have been most helpful. I will give that a try and let you know how it works. By the way, do you happen to have an amp/radio chassis like the one I have to use as a spare? RS-215J/RC1223C If so, $?

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Re: WANTED: RCA Receiver radio w/ power supply VHT52W

by MattTech » Sat Nov 15, 2014 4:32 am

No spares.
Properly serviced/restored, these units can run flawlessly for another 50 years.
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