Denon idler drive turntable Model RP

[Beeman]

Hello all - I am new here & need help

I have come across a couple of very interesting looking Denon professional idler drive turntables. Huge cast beasts - beautiful engineering. Denon markings on the huge motor & bits. Date stamped 1962. Cant find a thing on the web.

Model RP - 53C

Any links or info would be much appreciated

[Beeman]

Pics & progress on the attached threads - again any help at all with pics or info would be appreciated.

http://www.audioenz.co.nz/forums/showth ... elp-needed

http://www.audioenz.co.nz/forums/showth ... del-RP-53C

[smee4]

I don't know the table, but sure looks like a good one. Is that a valve circuit? I have not seen that before.

If you connect the whole thing to a 100V transformer at 50Hz, I can't imagine any problems. I have a bit of old AKAI equipment that runs on 100V, no turntables though.

[mawari]

They look nice !

A bit of info on the web I found, but only in Japanese ...

Paul

[Beeman]

Thanks Paul - could you post the links please even if they are Japanese. After anything we can find - cheers

[mawari]

Sound lab ( Japanese vintage audio shop ) has a page with a little info and pics :

http://www.soundlabo.co.jp/tube/tube.html

( Note I had to change my web browser encoding to Shift JIS to read this properly )

A Google search using the Japanese spelling of Denon ( both the current デノン and the older form デンオン ) rp53 throws out more than 200 results. Rather than list them, here is the search term :

http://bit.ly/AiSWKH

Good luck with the project !

Paul

[Beeman]

managed to make contact with the one live email address internationally for denon (very strange how hard it was to talk to them). They have nothing at all. As suggested the Japanese searches turned up a few picks & I now have the manual in Japanese with circuit diagram. So a good start. Still interested in hearing anyone with experience - thanks

[flavio81]

Wow! I learn something new every day... DENON made idler tables? Cool!

[LPfan]

Hi!
Congratulations on a great find.

I have no direct knowledge or experience of these, but would like to offer my suggestions.

First, can you identify what is that large aluminum can? Is it a capacitor or a solenoid? Please also check how it is connected to the frequency selector switch or the motor. Also check if the motor pulley is a dual step type with two steps for each speed i. e. one for 50Hz and another for 60Hz.

If that can is a capacitor and is wired to the motor then you have capacitor start/run synchronous motor. The switch could be changing the number of active coils inside the motor, less number of coils on 50Hz shall make it run faster so it can equal the speed achieved with more coils in operation at 60Hz supply.

If the motor pulley is a dual step type and that can is a solenoid, check if the solenoid is coupled to the idler wheel mounting bracket. The solenoid would be changing the position of that bracket, so the idler engages with the 50Hz step or 60Hz step as desired.

HTH

LPfan

[Beeman]

"Bump"

Still looking for info if anyone can help - cheers

[Beeman]

I have these lovely decks running. One motor is drawing way too much current. They have oiler tubes - any ideas as to what the correct oil would be & how often they should be lubed?

COULD THIS THREAD BE PUT BACK IN THE IDLER DRIVE SECTION THANKS MR ADMINISTRATOR? . Not much to do with Denon

[cafe latte]

I have these lovely decks running. One motor is drawing way too much current. They have oiler tubes - any ideas as to what the correct oil would be & how often they should be lubed?

COULD THIS THREAD BE PUT BACK IN THE IDLER DRIVE SECTION THANKS MR ADMINISTRATOR? . Not much to do with Denon

As I said on your oil thread compressor oil is ideal as the motor will have bronze bearings almost for sure especially as bronze makes for quiet running. Even if they were not bronze comprsssor oil would be fine, but it is almost certain they are. I would be dismantelling the motos and cleaning them and soaking the bronze cups in oil over night, then reoilmaybe once every couple of months with a few drops. My Commonwealth which has a similar motor specifies light machine oil throught and compressor oil is high quality machine oil with anti wear additives and is detergent free and does not have additives that encourage water absorbtion so it is perfect.
Work now making sure all the bearings ie spindle, motor and idler bearings are in tip top condition and completely clean will pay dividends when you finally finish the your project and reward your efforts with quieter running.
Before you spend the money on a motor rewind change the motor run capacitor as this may be your problem regarding a higher current draw. Also that turntable may have drier bearings or dirty bearings, there is no way you will get enough oil down the oil tube if the bronze cups are compeletely dry you really should with care open the motors up or get it done so you can clean and oil the bearings properly. When I did mine on my Commonwealth I tried to get new bronze bearings even though mine are in good condition (just trying be thorough) anyway it turned out they are unavailable so it is worth the effort now to get yours properly oil soaked.
Here is my project for your inspiration viewtopic.php?f=18&t=34547
Regards
CL