The Electronics Universe
Electronics Forum => Other Electronics and repair => Topic started by: kinkydoints on September 09, 2018, 01:32:43 PM
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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.
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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 .
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found that the stop was not stopping the shaft from rotating all the way through . reason for two places of repair
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Seen that a few times.
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Doing a restoration is not as easy as I thought. have run into some setbacks but am still going forward. had a broken knob on one of the rotary switch's and did some searching for a repair option. found a youtube video
that addressed the problem . cloning vintage knobs Wesley Treat's channel had this video.
https://www.youtube.com/watch?v=aNBHtlhlHF4 10 min. video was very cool had some things to buy but the quality of the repair and the "original " look it gives right down to the small scratches was very impressive for the do it yourself kinda person.
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Doing a restoration is not as easy as I thought. have run into some setbacks but am still going forward. had a broken knob on one of the rotary switch's and did some searching for a repair option. found a youtube video
that addressed the problem . cloning vintage knobs Wesley Treat's channel had this video.
https://www.youtube.com/watch?v=aNBHtlhlHF4 10 min. video was very cool had some things to buy but the quality of the repair and the "original " look it gives right down to the small scratches was very impressive for the do it yourself kinda person.
I agree, restorations can really be tough at times. Finding and recreating vintage parts are near to impossible. Why I never throw out old electronics.
That was an excellent video. Thank you for posting it. I never seen that one. His style is fun to watch.
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That was an awesome video on making knobs!