Antique radios, Old Time Radios

emud: 60; Senior

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Forum » Radios and other type of sets (Physics) etc. » RADIO MODELS DISPLAYED » emud: 60; Senior

Paul Pinyot

USA Articles: 171
Schem.: 17
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07.Oct.05 06:23

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emud: 60; Senior

Hello gentlemen,

It has been a while since I wrote to RM.org. I have been talking up this site and sending people here for help. It is nice to be back.

Any how....

I am aligning the FM section of an American Emud 60. There is a problem with getting the proper alignment instructions for this three band (AM, FM, SW) unit. I am using the Sams Photofact procedure from the Emud Junior to cross reference the test pins.

If you reference the schematic from the Emud Senior 60 (on this web site) the problem is with getting a DC zero voltage null with adjustment #21 at unmodulated 10.7 Mhz signal across test points B and C.

There also seems to be great interaction between adjustment 21 (null) and 19 (peak).

I am beginning to think that I am miss adjusting the unit or there is a bad component (EABC80 tube has been tested with a Heath Kit emissions tester). Any suggestions would be appreciated.

It is 0008 in the morning. So I decided to turn off the power in the shop, write this message and get some sleep.

Thanks,
Paul.

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Hans M. Knoll

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D Articles: 1642
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07.Oct.05 10:40

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Not a Zerropoint

Hello Mr. Pinyot,

your Voltmeter for Zerro align, with "Center-Zerro" and no Ground,

must be connected between the points "A" and "C".

On points "B" and "D" (with zerro left) , only for maximum adjusting.

Regards from Hans M. Knoll

This article was edited 07.Oct.05 10:51 by Hans M. Knoll .

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Paul Pinyot

USA Articles: 171
Schem.: 17
Pict.: 147
07.Oct.05 20:59

Count of Thanks: 6

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Hans,

I can't say enough good about you and this board! When I used the correct test point hook-up that you recomended, the alignment "dialed in" precisely.

Lesson learned: - Save complicated alignments for the moring after a good night's sleep. And Read RM.ORG regularly :~)

Thanks again,
Paul.

This article was edited 07.Oct.05 21:02 by Paul Pinyot .

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Hans M. Knoll

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D Articles: 1642
Schem.: 153
Pict.: 81
07.Oct.05 21:44

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Hello Paul

Please realize, daylight gives ( you) more overview!

Regards, Hans

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