Wireless remote control for STUDER A820

[yjwu]

My A820 still suffered from spoolng problem and parts are in journey. I don't know whether new parts will solve it.

A few years ago I purchased a wireless remote control from eBay. It can control my A820, A807 Mk-I and A807 Mk-II.

It was a small sat-up box plugged into parallel port. Last weekend I spent some time to fit this box inside A820. The same can be done on my other A807's too. The disadvantage was that I need to order two more remotes for each recorder.

Remote itself can be tugged under A820. I had the plan in mind but need something to curve its cradle.

 

[yjwu]

Not perfect but working.

 

[Ki Choi]

Mr. Wu

Is the remote RF based? I don't see the receiver.

Thanks,
Ki

 

[yjwu]

Hello Ki:

I hide the content of the receiver behind that ugly empty PCB board. Link to A820/A807/A812/A816 follows:

https://www.teacremotes.com/revoxremotes/Studer_A807.htm

Do you have any suggestion on my spooling problem? I though I became less creative facing old problems encountered before. I was able to trace a non-working A820 to a hairline cracking of gold finger on MP-MASTER and a single AD7524 chip back on 2014 when I got my A820. I also pinned down INCORRECT RADIUS MEASUREMENT to ill-tuned tension sensor a few years ago. Now I am still looking for answer.

Why STUDER required first L/R pair of AD7524 on earlier spooning motor control board to have feedback resistance between 9.5k Ohm ~10.5k Ohm and this restriction seemed to be dropped later?

Greetings!

Yeun-Jung Wu

 

[Foxbat]

The transmitter, that comes with that remote is not ideal - it is not pretty, and cluttered with buttons you don't need.

I found a better solution - for about $15 (sometimes a bit more) you can buy a very nice looking Sony RTM-314, that has just the right buttons - I have several of them.

https://www.ebay.com/itm/Sony-RMT-3...599011?hash=item3b42220fe3:g:eSYAAOSwi-heRwfC

 

[Ki Choi]

Hello Ki:

I hide the content of the receiver behind that ugly empty PCB board. Link to A820/A807/A812/A816 follows:

https://www.teacremotes.com/revoxremotes/Studer_A807.htm

Do you have any suggestion on my spooling problem? I though I became less creative facing old problems encountered before. I was able to trace a non-working A820 to a hairline cracking of gold finger on MP-MASTER and a single AD7524 chip back on 2014 when I got my A820. I also pinned down INCORRECT RADIUS MEASUREMENT to ill-tuned tension sensor a few years ago. Now I am still looking for answer.

Why STUDER required first L/R pair of AD7524 on earlier spooning motor control board to have feedback resistance between 9.5k Ohm ~10.5k Ohm and this restriction seemed to be dropped later?

Greetings!

Yeun-Jung Wu

Mr. Wu
I have not visited WBF in a while and didn't see your A820 spooling issue.
Send me the link.

Hope you are staying safe in Taipei.

thanks,
Ki