I'm really paranoid when I have a Collaro changer on the bench. So much can go wrong and I'm not experienced enough to both figure out what went wrong and then how to fix it. I'll need all the good thoughts I can muster...

Are you planning to replace the selenium rectifier? Those things are notoriously unreliable in their old age. Your schematic looks good to the terminal strip. Unless my eyes are not seeing right, the way you have the terminal strip drawn would make a dead short. The terminal strip, as drawn, is more...

The plane graveyard is down by Mirana, AZ. I was there once with my stepdad. He flew P-51's in WW2. The old WW2 song about "coming in on a wing and a prayer" was written in honor of the DC 3 according to Sam. Sam always told me that any pilot who crashed a DC 3 wasn't much of a pilot in th...

We used to travel US 70 from the Texas state line thru Roswell, Riadoso, down to Interstate 10. Lots of pretty country on that drive, lots of "in the middle of nowhere" as well. It goes thru the white sands as well.

I posted a comment, then deleted it. I answered my own question.......

The motor on this particular changer is different from the other Collaro motors I have worked with. The "shift" mechanism is built as part of the motor housing. There is a plate on the bottom end of the motor that comes off so the rotor will drop out of the motor. I had to remove the cycle...

One more member just got deleted because of no location. I'm serious about this, guys.....

I wonder if Dynavox may not have made their equipment. That cabinet looks Webcor/VM-ish to me. The RCA schematic you posted might be pretty close to what you actually have. I wonder if the wire from the line to the speaker might be back to common negative for some reason, hum prevention, perhaps? Si...

This particular Collaro changer has the remote control components to deal with, so it has a few more goodies than others have. My goal here is to remove the motor with a minimum of drama. Then I'll decide what I need to do otherwise. It works fine. I'm sure I can fix that, though..... ;) :oops: :roll:

I have the tuner, power supply and MPX all back into the cabinet. It may just be my ears today, but I could swear I actually heard some bass responce today in my old CG. I replaced the cathode follower 12AX7, but that wouldn't affect the bass response any. The good news is that the eye tube now work...

There are three 12AX7's in the tuner. One for audio amp, one for phono amp, one for cathode follower. I think then there are two in each amp. One for audio amp, one for phase inverter. I measured the 470K resistor in the eye tube circuit, from pin 2 to pin 4 of the 6E5 eye tube. It measured over 3 m...

I think the idea of drawing your own schematic is an intriguing one. And for a simple phono amp, it would be the ideal place to start. I might suggest that you study similar schematics of record player amps to see how Sams would draw one. Start with the power supply, and end up at the speaker, just ...

I deleted 8 members for failure to post their location.

I am sick to death of having to mention this to every new member. I have asked nicely, I have posted this in big red letters at the top of the forum index page, done all I know to do. So here it goes..... Any new member who fails to post their location when they register for membership WILL have the...

The tuners are essentially the same. The CG uses 12ax7 audio tunes vs. 6eu7. Then there's the remote control components. They both have 11 tubes.

There are currently over 1600 "guests" on the forum as I type this. Earlier this afternoon, we had over 2600. That is almost 100 times the normal traffic on this forum. Bill has mentioned that he has noticed higher than normal traffic as well. The intention of all this traffic is to overlo...

I finally got caught up enough around here to get on this project. I have the changer and tuner/power supply/MPX assemblies out. My challenge with the changer is that the upper bearing of the motor is really stiff. If I don't run it for a month or so, the motor won't start without removing the platt...

Maybe this will help?

https://www.classichificare.com/viewtopic.php?t=1647

Or this:

https://www.worthpoint.com/dictionary/p ... ome-radios

Please do keep us updated on this project. Pictures? I'm not familiar with Fairchild cartridges....

Bill got one, I just got one. The spambots are back. We'll try to stay on top of it. If any of you guys see something amiss, please let Bill or me know. Thanks....