1958 Grundig 8058 PE Rex w/ mag cartridge

[omegaman]

I got this Perpetuum Ebner Rex Deluxe changer in a Hi-Fi Console Grundig radio

It came with an early magnetic cartridge

The changer works great mechanically but it doesn't sound as good as I think it should

I recapped this whole receiver
The radio sounds fantastic

The record player sound is all garbled in bass and not as it should be. I put an inexpensive stylus in it but it never sounded right

I de-oxit'ed the cartridge pins and connections
I tried the changer plugged in to another receiver and it still sounded poor

Any ideas to check with the amp?

Where do I get a replacement for this cart?

I ordered a new stylus again, to rule that out

Basically, how do you check a cartridge?

[bob91343]

Try another one. You can just tape another cartridge on just to hear how it sounds. The only good test for a cartridge would be a test record, oscilloscope, and stylus gauge/alignment tools.

[omegaman]

Interesting, I turned the mag cart over to it's green side and stuck the red stylus in and IT WORKS GREAT

I am starting to think that a bad connection ON THE CART 78 side might have caused the 33/45 side to sound bad. More detailed work needed. It makes sense that I don't ever play 78's so it might be suspect

These German systems have silver for connections and they need special attention. They turn black when oxidized

You have to be very meticulous and de-oxit ALL the record changer's wired connections to get the best sound.

Whats that silver cleaner's name?

Anyway, good enough



So...kind 'a quiet in here...hellllloooooo...


These PE Rex turntable work pretty good and are cool in how they partially lower the record to detect it's size. One button operation

I have this PE Rex in this 1958 Grundig and another PE Rex in my 1959 Blaupunkt console

The PE Rex in the Blaupunkt was a real pain because it had a 50Hz motor in it and ran fast. I had to get another PE Rex and pull the 60Hz motor for transplant. I think its in a thread here or over at AK

[bob91343]

It isn't the motor that has to be different; it's the spindle (motor shaft) diameter. If you are good with a lathe you can turn down a 50 Hz spindle just the right amount.

I used to work on those Perpetuum-Ebner units all the time, not as much of course as the Duals and the US and British made ones.

I forget the chemical name for the silver cleaner but you can buy the stuff that is used to polish tableware, often made by some company with Copper in the name, like CopperBright or similar. Wikipedia probably can help.

[omegaman]

No, the turret system does not use a spindle like the Dual does

Believe me, I spent some time trying to come up with a solution

[bob91343]

Still, it's the shaft diameter that determines the speed. It's a long shaft and drives little belts but it's still the controlling part.

[omegaman]

I agree because the turrets did not change, only the motor

It was a path I went down, Try to find a motor, try to find a parts unit, any unit, I found one, motor good, carrier not so much. That's how I got to the motor swap

The changer is hard to find parts for and doesn't sound very good when performing

but I had to keep the Blaupunkt and Grundig original