Mystery Control

Hello, dear Radio Collectors.  Hopefully, someone else with an aptly named Mystery Control can answer this question: how fast should the dial turn?  If I select the last station hole and crank the dial all the way around to the stop and let go, it takes my unit approximately 3.5 seconds to return to the rest position.  Since the unit sends pulses that activate a stepper relay in a receiver in the radio, I assume that the pulse speed is important.  Does this sound like the correct rotation speed?

Update, 4/16/09:

No one answered my post here so I tried antiqueradios.com  There I learned that the dial speed should probably be a second or so faster.  I won't really know until I get both the Mystery Control and the radio running,  In the meantime,I will mark this post as no longer needing an answer.

Dear Michele,

Sorry, but the question status cannot be removed by editing. Only a following answer with info state can remove the question mark from the thread. 
That will happen herewith...

Kind regards

Hello, Dear Radio Collectors.  I just got one of these fascinating devices and have a few questions.  First, my unit came with a 67.5 v. B battery in it.  However, the model page shows it uses a 45 V. battery.  Which is correct?

Second, the dial is slghtly warped in one spot.  It seems to be made of some sort of plastic.  Does anyone have any recommendations on how to flatten it out?  Is that even possible without damaging it?

Third, does anyone have a picture that shows how the batteries were placed inside the unit?  Apparently, there was a separate plug for the batteries which is missing from mine.  Someone just soldered two D cells together for the A battery and then poked the wires into the 4 pin plug.

Fourth, while I'm waiting for a radio that matches this remote control, does anyone have an idea of how to test it to see if it works?

I'm also looking for a schmatic for it.

Thanks!

I feel a bit silly answering my own questions, but since I first posted this I've resolved most of these issues.  The correct battery is actually 45 v.  In fact it is a special "combo" battery with both A and B voltages in one box and a custom 4 pin jack that matches the plug in the unit.  Apparently the previous owner only had a 67 v. battery (or was trying to get greater range).  One of our members makes very nice looking repro batteries for this unit.

I also found a nice Philco 39-116 radio which should be arriving soon.  This is one of the models that the Mystery Control worked with.  And another member very kindly uploaded the schematic.

All I'm left with is figuring out how to unwarp the dial.  I may just leave it alone rather than risk making it worse.

hi michele, have you thought of sending a market request for a replacement on forum, you never know , some member might just be parting out a model with the self same dial , in it.its worth a try , regards maitiu.

Well, I'm not too optimistic but I took your advice, Maitu.  We'll see - you never know :-)