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Atwater Kent model 20 Big Box
#17

FWIK the A-K grid leak uses a holder with a smaller clip O.D. more like fuse clips. The A-K leak has a shoulder on the inside edges of the metal electrode ends that co-inside with the spacing of the electrode clips. The A-K leak is a smoked glass rod within a hollow glass rod "soldered" into the ends of the electrodes. I have not been able to determine how the solder grabbed the glass, but it does... The A-K leak can be "re-built" the ends are de-soldered and retained. a length of borosilicate glass tubing is prepared by torching the cut ends to smooth the glass. The electrodes are cleaned of solder and a twist drill is used to ream the ends to remove all the solder and a small amount of the brass, enough to allow the new tubing to fit, re-cut the glass tube to make the exact length as the original leak. A 1/10 watt 2.2meg axial resistor will slip inside the new tubing. Drill a hole at each end of the electrode to accept the resistor leads. Solder one end of the resistor to center it in the combination of electrodes and glass, the complete by soldering the opposite end. A touch of super-glue will firm up the electrodes to the glass. The resistor can be blackened with a sharpy to disguise that it is modern. A lot of work for appearance sake.

I wanted to see a pix of the three tube island not only to see the transformer location but if the OEM A-K grid leak clips are still in place or have been broken or removed so the Aerovox leak could be installed.

BTW that value of 6 megs leak is still O.K. the detector will not be cut off just more sensitive.

Post the diameter and the height of the A-K transformer existing and take resistance measurements of the two windings, post as well. Use an analog meter if you have one. I will look and see if I have a suitable transformer.

If I have a transformer we can use the PM (private message system) to exchange email and addresses. chas

Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”


Messages In This Thread
Atwater Kent model 20 Big Box - by TTech - 04-18-2021, 04:49 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-18-2021, 04:53 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-18-2021, 05:56 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-18-2021, 08:56 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-18-2021, 11:51 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-19-2021, 09:14 AM
RE: Atwater Kent model 20 Big Box - by Chas - 04-19-2021, 10:46 AM
RE: Atwater Kent model 20 Big Box - by Eliot Ness - 04-19-2021, 12:31 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-19-2021, 04:59 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-19-2021, 06:47 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-19-2021, 07:52 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-20-2021, 08:47 AM
RE: Atwater Kent model 20 Big Box - by Chas - 04-20-2021, 10:28 AM
RE: Atwater Kent model 20 Big Box - by TTech - 04-20-2021, 11:15 AM
RE: Atwater Kent model 20 Big Box - by Chas - 04-20-2021, 01:29 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-21-2021, 07:19 AM
RE: Atwater Kent model 20 Big Box - by Chas - 04-21-2021, 09:54 AM
RE: Atwater Kent model 20 Big Box - by TTech - 04-21-2021, 12:01 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-21-2021, 10:13 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-22-2021, 03:45 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-22-2021, 04:30 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-23-2021, 07:18 AM
RE: Atwater Kent model 20 Big Box - by TTech - 04-23-2021, 04:28 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-24-2021, 08:39 AM
RE: Atwater Kent model 20 Big Box - by TTech - 04-24-2021, 10:03 AM
RE: Atwater Kent model 20 Big Box - by TTech - 04-25-2021, 09:52 AM
RE: Atwater Kent model 20 Big Box - by Chas - 04-25-2021, 10:20 AM
RE: Atwater Kent model 20 Big Box - by TTech - 04-25-2021, 11:51 AM
RE: Atwater Kent model 20 Big Box - by Chas - 04-25-2021, 03:59 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-26-2021, 04:18 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-29-2021, 12:38 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-29-2021, 04:23 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-29-2021, 05:01 PM
RE: Atwater Kent model 20 Big Box - by Chas - 04-29-2021, 05:10 PM
RE: Atwater Kent model 20 Big Box - by TTech - 04-29-2021, 05:41 PM
RE: Atwater Kent model 20 Big Box - by Phlogiston - 05-01-2021, 03:15 PM
RE: Atwater Kent model 20 Big Box - by TTech - 05-01-2021, 07:18 PM
RE: Atwater Kent model 20 Big Box - by TTech - 05-02-2021, 01:02 PM
RE: Atwater Kent model 20 Big Box - by Phlogiston - 05-02-2021, 04:17 PM
RE: Atwater Kent model 20 Big Box - by TTech - 05-03-2021, 01:35 PM
RE: Atwater Kent model 20 Big Box - by TTech - 05-04-2021, 02:47 PM
RE: Atwater Kent model 20 Big Box - by TTech - 05-04-2021, 05:26 PM
RE: Atwater Kent model 20 Big Box - by Chas - 05-06-2021, 11:05 AM
RE: Atwater Kent model 20 Big Box - by TTech - 05-07-2021, 08:34 AM
RE: Atwater Kent model 20 Big Box - by TTech - 05-07-2021, 08:58 AM
RE: Atwater Kent model 20 Big Box - by Chas - 05-07-2021, 09:50 AM
RE: Atwater Kent model 20 Big Box - by TTech - 05-07-2021, 11:46 AM
RE: Atwater Kent model 20 Big Box - by Chas - 05-07-2021, 12:01 PM
RE: Atwater Kent model 20 Big Box - by TTech - 05-12-2021, 08:59 AM
RE: Atwater Kent model 20 Big Box - by admin - 05-12-2021, 09:26 AM
RE: Atwater Kent model 20 Big Box - by Phlogiston - 05-12-2021, 05:18 PM
RE: Atwater Kent model 20 Big Box - by TTech - 05-12-2021, 08:49 PM
RE: Atwater Kent model 20 Big Box - by Chas - 05-14-2021, 11:13 AM
RE: Atwater Kent model 20 Big Box - by OZ4 - 05-17-2021, 11:57 AM



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