Author Topic: On / Off volume switch repair? poor old hallicrafter  (Read 125 times)

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Offline kinkydoints

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On / Off volume switch repair? poor old hallicrafter
« on: September 09, 2018, 01:32:43 PM »
in my first stage of this attempt to repair a hallicrafters s120 , I found that this on/off volume switch was used to power up straight from line cord. no fuse . I decided to remove and clean contacts and wiper on the inside with some contact cleaner . upon doing this the on /off switch stopped working and let the shaft rotate too far around. then would not return to off ... no click off . opened the switch up to find that the finger inside that goes into the switch was worn bad enough to miss the slot or slip by the slot . I seen a technique to fix plastic with super glue and baking soda . ? was wondering if this just way too  much work ,and be better off trying to find a replacement  . any idea where to find a replacement with the shaft as long with internal switch . shaft looks to be 3"  to 3.25" long this is listed in the part list as a 2 meg ohm 30% 1/8 watt variable, volume control switch with internal switch. ya guess im stuck trying to fix that finger . got some small files to fine tune the repair, might take longer than i hoped to get this radio up and running.

Offline kinkydoints

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Re: On / Off volume switch repair? poor old hallicrafter
« Reply #1 on: September 11, 2018, 07:11:15 AM »
well I have not tried this kind of repair before but after some fabrication and tuning , the switch works again on /off volume.  it might not be a permanent repair , but it's until I can find a replacement.

Was wondering on this s120 there is a standby /receive switch , used to keep the units tubes powered up and hot for instant on...if i used a potentiometer of the correct resistance . without a switch. I would like to use that standby switch to power on / off shouldn't be to hard to rework the wiring .


Offline kinkydoints

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Re: On / Off volume switch repair? poor old hallicrafter
« Reply #2 on: September 11, 2018, 07:18:35 AM »
found that the stop was not stopping the shaft from rotating all the way through . reason for two places of repair

Offline Radio Tech

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Re: On / Off volume switch repair? poor old hallicrafter
« Reply #3 on: September 17, 2018, 12:48:53 PM »
Seen that a few times.
Buddy kc4umo