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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 27th Nov 2020, 2:39 pm   #21
Gabe001
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Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 296
Default Re: Bush AC34 restoration - quiet audio, help, please.

The easiest way to start if you have no specialised equipment (like me) is to try and play some kind of sound (using a cheap bluetooth receiver for example, or phone or iPod etc) and going in at the volume control. All you need is a stereo cable and some crocodile clips. If the set is still quiet, the problem most likely lies with the output phase.

Gabriel
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Old 27th Nov 2020, 3:05 pm   #22
John10b
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Join Date: Nov 2016
Location: Aberaeron, Ceredigion, Wales, UK.
Posts: 1,805
Default Re: Bush AC34 restoration - quiet audio, help, please.

I’ve just put my AC34 on the bench and carried out some basic observations, I restored this set last year.
1. Touching the PU socket with volume control full up getting a good buzz.
2. With the set near my workshop window, using only the frame aerial, I can receive stations on both LW and MW with more than enough volume to comfortably listen too.
The problem I had with the set was the second IF capacitor had a broken connection, which I repaired.
I then carried out alignment and this made a huge difference.
Hope that helps.
John
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Old 27th Nov 2020, 8:48 pm   #23
Scotorvm
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Join Date: Jul 2020
Location: Falkirk, Stirlingshire, UK.
Posts: 94
Default Re: Bush AC34 restoration - quiet audio, help, please.

Quote:
Originally Posted by Freya View Post
Did you change any pF caps inside the cans ?
Hi, no nothing changed inside the cans. Just the visible wax ones under the chasis, Didn't touch the wee square brown ones either.
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Old 27th Nov 2020, 8:51 pm   #24
Scotorvm
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Location: Falkirk, Stirlingshire, UK.
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Default Re: Bush AC34 restoration - quiet audio, help, please.

Quote:
Originally Posted by Gabe001 View Post
The easiest way to start if you have no specialised equipment (like me) is to try and play some kind of sound (using a cheap bluetooth receiver for example, or phone or iPod etc) and going in at the volume control. All you need is a stereo cable and some crocodile clips. If the set is still quiet, the problem most likely lies with the output phase.

Gabriel
Thanks Gabriel, that's a great tip, I have all those items, will have a bash next week. Cheers.

Lee
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Old 27th Nov 2020, 8:56 pm   #25
Scotorvm
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Join Date: Jul 2020
Location: Falkirk, Stirlingshire, UK.
Posts: 94
Default Re: Bush AC34 restoration - quiet audio, help, please.

Quote:
Originally Posted by John10b View Post
Iíve just put my AC34 on the bench and carried out some basic observations, I restored this set last year.
1. Touching the PU socket with volume control full up getting a good buzz.
2. With the set near my workshop window, using only the frame aerial, I can receive stations on both LW and MW with more than enough volume to comfortably listen too.
The problem I had with the set was the second IF capacitor had a broken connection, which I repaired.
I then carried out alignment and this made a huge difference.
Hope that helps.
John
That's great John, thanks for that, will try this, not sure about alignment yet, but will look into it.
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Old 27th Nov 2020, 10:43 pm   #26
John10b
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Location: Aberaeron, Ceredigion, Wales, UK.
Posts: 1,805
Default Re: Bush AC34 restoration - quiet audio, help, please.

Just to be clear I carried out IF alignment, after repair.
John
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