7 pin connector for tone cable

[pierre]

Hello everyone,

I'm restoring a Ami Rowe Diplomat.   There's a female 7 pin plug nearby the turntable and I suppose this is where I should plug the cable that will connect to my amp (external amp for the moment as the juke box doesn't have its original amplifier).

Here's a picture of the plug :
expertise-internet.com/jukebox/IMG_20201223_213032_0.jpg


Would a cable like in the link below be compatible ?
www.amazon.fr/OpenII-Adaptateur-Broches-syst%C3%A8mes-Olufsen/dp/B07VC31DDQ/



Merry Christmas,


Pierre

[Ron Rich]

Hi Pierre,
It appears to me that the cable has a female jack on it-- the same as the one on the phono which is a "standard" 7 pin tube socket. Ron Rich

[pierre]

Hi Ron,

Many thanks for your reply. I'm away from home for a few days, therefore I can't have a look at the juke box. But from my memory, I don't think I have seen any female jack plug on the turntable. There's a hole at the center of the seven pin plug, but it's just an empty hole without any connections. Anyway, I ordered the 7pin cable and will see if it works. I might have to reorder the wires. I'll share my results.

[Ron Rich]

Hi Pierre,
The photo of the black, 7 hole item you provided is a 7 pin (female) tube (aka "valve") jack. The hole in the center was provided as early 7 pin (and 9 pin) miniature tubes, had a "tail" there where the glass was blown-- The photo of the cable and plug, appeared to be that of a female, not a male plug -- I could well be wrong, as I do not read French, very well ! Ron Rich

[pierre]

images-na.ssl-images-amazon.com/images/I/61y6sCGxzoL._AC_SL1500_.jpg

[Ron Rich]

Pierre,
I dono-- that sure "looks FE-male" to me ?? Ron Rich

[jukenorman]

Hi Pierre,
No that won't fit because it has an overall metal sleeve (that circular sleeve right next to your arrow). If you can cut away the metal sleeve, it might fit but I can't be certain! An option would be to replace the socket on the jukebox chassis with a 7 pin DIN connector socket - then your cable would fit OK.
Norman.

[wdln]

Even if you removed the shell as Jukenorman said, I don't think a 7-pin DIN would fit, or it might stress or break the female connector. The pins are fatter and may not be spaced or positioned correctly. I don't have a DIN cable on hand to check. Too bad someone removed and lost this critical connection!

However, I looked on the Rowe-AMI R-80 I'm currently working on and it has the same connector as yours on the mech for the tonearm output. I can verify that the female socket is the same as what is used on a 7-pin miniature tube. The male cable that connects to the amp fit right into my tube tester. The center hole is not used for anything. While my research indicates that nobody makes a solder-on male connector of this type, they do make "socket savers" for tube gear, which are basically male to female adapters wired straight through.

www.ebay.com/itm/Amptata-Audio-Gold-7Pin-6AQ5-6X4-6AU6-ECC91-6Z4-Amp-Vacuum-Tube-Socket-Saver/233703898404

Most of the ones I saw look like they can be disassembled with a single screw in the middle. So you get one of these, you can take it apart to harvest the male side, and use it to wire up your own cable. I'm not sure what would be on the other end going into your amp... if it's RCA's those are easy to source, but if it's some kind of special multipin connector you're back to looking for it. My R-80's amp uses RCA inputs.

The pinout for the 7-pin connector should be pins 2 and 5 for ground, pin 1 for left + and pin 6 for right +. As you look at the face of the male connector, pins pointed at you, pin 1 is the first pin clockwise from the gap. Use braided-shield audio cable to make the new cable, with the shields tied to pins 2 and 5. Figure out a way to create some strain relief for the cables coming out of the hacked-up tube socket adapter.

[Ron Rich]

Those male plugs should be available ( and possibly the whole wire set-up) from one or more of the used parts suppliers listed in our FAQ's section-- Both Rowe, And Seeburg, used them.

[pierre]

Thank you everyone for your advices.
wdln, thank you for the ebay link, that would have been perfect I guess but I had already followed jukenorman's advice and ordered a 7 pin DIN connector socket that should come in the mail today. And I've removed the original socket yesterday, to prepare for the new one. The socket had only 3 pins out of 7 that were connected to 3 wires (black, white and red). I suppose black should be for ground, red for right channel and white for left channel.
I will take pictures and share on this thread how it went soon. By the way, is there any way to embed images inside a post ?

[Ron Rich]

Hi Pierre,
Yes-- read the FAQ's section . Ron Rich

[pierre]

Hi everyone,

Just a quick login to wish you all a great new year 2021 and to give you some feedback on the 7 pin connector.

I removed the original 7pin connector (I had to drill out the rivets) and replaced it with a new 7 pin DIN connector socket. The socket has the exact same dimensions therefore it was an easy task to do.

It works, and for the first time I could at last play a record and hear it on that jukebox.  I'm not there yet though, there's obliously some shield/ground problem as sometimes I get a loud hummm sound and also I need to keep the selection buttons pushed down in order for the selection to work.  Hopefully, I'll find some spare times in a few days to try to figure this out.

Here are some pictures :

[wdln]

On that hum, I'd start by making sure the ground is hooked up properly. On the old connector the ground was on pins 2 and 5. Since you bought a pre-made DIN cable to go to the amp, you might double check to make sure the outer shell of the RCA connectors go to pins 2 and 5 on the DIN using a continuity meter. I can't immediately find the standard wiring layout for an RCA to DIN cable like that one; the ground might be wired to different pins on your cable. If the ground goes to different pins on the DIN, you would need to move and re-solder the grounds on the back of your new female DIN connector to match up to the pins that the cable is using, if that makes sense.

While you're at it, you should also check to make sure the center pins of the RCA's go to DIN pins 1 and 6, respectively.

One way to figure out if it's an amp problem or a ground problem would be to select a record, and once it's playing, pull your new cable out of the mech or amp. If the hum (and the music) goes away, it's probably the wiring you just put in. If the hum stays, it's likely an internal amp problem.

On the selection buttons... it could be a latch solenoid issue?

Your pictures aren't showing up for some reason.

[Ron Rich]

Hi Dave,
His photo's show up here ? What are you using to view this forum ?
Ron Rich

[wdln]

Huh... I always use Google Chrome, but I tried Firefox and Safari and get the same results. I just see a grey circle with a dash on it for each of the two pictures. Looking at the image source, it looks like it's coming from your Google account, Pierre. Maybe those photos are not set to public? Not sure why Ron would see them though.