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OT , brand new, Panasonic RE8840 quadraphonic receiver from 1974

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Christian Christensen
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Stockholm
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Christian Christensen Posted: Sun, Nov 10 2013 2:09 PM

I have tried to find information on the site, if it is okey to post questions about other brands then B&O, but havent been sucsseful

So if moderator remove this post, I will certainly understand

I have this brand new Panasonic RE 8840 from 1974, that I pickuped up year2000 in a small radio store in a small town on Vancouver Island. It had been in their storage for all those years.

Its a quadraphonic receiver with built in de-attachable 4-8 track player

I have basicly forgot it was in my storage, so I unpacked it form box and did a test run last night
Everything works  exepct that belt in tape transport has of course detoriated.

Unbelivable could I get both service manual and order new belt yeasterday evening for this very odd machine that there is almost no hits on the webb for.

So Question.

1. I run this machine with a huge 220/110 tranformer, as I live in Sweden. In what way will the lower power frequence 50 hertz affect this machine ? 

2. The motor does some humming when running. I might be normal for that machine, but if not.
Is there anything i could do?
I guess that a replacemant motor Mastsushiba mye-6a would be  dream scenario to find. 

 

 

My re-capped M75 are my precious diamonds.

BO
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Halmstad, Sweden
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BO replied on Sun, Nov 10 2013 4:50 PM

Lovely piece of equipment!

Re: 60 to 50 Hz, Lower frequency requires larger transformer (at least the iron core) however normally home electronics is designed to cope with both 50 & 60 Hz. What can happen is that the transformer will run hot. Try to run it for a couple of hours with some load and keep an eye (or hand) on the transformer temperature. if it OK then its OK. If it runs hot then you have to find a replacement trafo designed for the European market.

//Bo.
A long list...

Christian Christensen
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Stockholm
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Replacement transformer for the eueopean market ? I feel pessemistic after hours of webbsearching

 

Looks like impossible, no europan hits on the webb, even if i search for Technics. ( except for a belt supplier in germany )

The secondary side of the transformer shows at least 8 differnet levels.

Primary has only one, so to me  it looks like a model for the american and asian market.

Who knows, maybe the only one in Europe?

My re-capped M75 are my precious diamonds.

Jeff
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USA
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Jeff replied on Sun, Nov 10 2013 7:49 PM

Holy cow, I haven't seen one of those since my buddy in high school had one! He had a turntable, no  8-track, though for a source.

The only effect I'd expect from 50 hz is that the tape deck will run slow, most of those old and less expensive units like 8-tracks didn't have things like servo controlled motors, but were standard synchronous ones. And 8-track, well, I don't think there ever was an 8-track version of the Nakamichi Dragon, no high end 8-tracks.

Jeff

I'm afraid I'm recovering from the BeoVirus. Sad

Christian Christensen
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Stockholm
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Jeff, by looking at that motor, se the image it says 13.2 volt DC.

My re-capped M75 are my precious diamonds.

Christian Christensen
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Stockholm
Posts 512
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Bronze Member

Jeff, then we have somebody that have seen this machine before.Smile
Anyone from europe that have seen this machine?..hoping for that it exist as a 220 version.... 

My re-capped M75 are my precious diamonds.

Jeff
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USA
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Jeff replied on Sun, Nov 10 2013 9:26 PM

Christian Christensen:

Jeff, by looking at that motor, se the image it says 13.2 volt DC.

Ah, good! You should be OK then. Most turntables of the era had synchronous motors, guess that didn't hold true for 8 tracks.

I so remember staring at that front panel, at the time I thought it was soooo cool with those round dials and the sexy joystick and polar plot display for the quad balance control. All I had then was a Panasonic all in one unit, stereo, with a table, cassette deck, and tuner with crappy small speakers.

 

Jeff

I'm afraid I'm recovering from the BeoVirus. Sad

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