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 Radio suddenly goes loud then down again.
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 Return to top of page · Post #: 1 · Written at 12:45:56 AM on 16 May 2024.
Frequencyman's Gravatar
 Location: Brisbane, QLD
 Member since 18 April 2024
 Member #: 2633
 Postcount: 5

Hey folks, was wondering if I could have some help. I have a HMV little nipper 61-51 and after a while being on the radios volume suddenly goes loud then back to the set volume again, Then loud again. what could be happening here? it has been restored by a professional so not sure what the problem could be. any help would be great!

Thanks

Steven


 
 Return to top of page · Post #: 2 · Written at 12:59:25 AM on 16 May 2024.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6720

One possible cause of random volume variations is bad capacitors in IF cans.


 
 Return to top of page · Post #: 3 · Written at 10:22:00 AM on 16 May 2024.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5303

As its been messed with It could be a variety of issues however, if there is a bad connection on the earthy end of the volume control, that is not uncommon. Mica caps will do that as well along with a tube.

Might pay to slip the chassis & take a photo of the innards, so we see what old stuff is still in there.

Marc


 
 Return to top of page · Post #: 4 · Written at 5:47:36 PM on 16 May 2024.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2405

What sort of antenna is it connected to?

Radios without internal ferrite or loop antennas and with an inadequate wire antenna tend to pick up a lot of signal from the mains wiring. It may just be that.

If you can connect a meter to the AGC line and see what it does when the volume changes, then we would have a better idea.

Or try running it in another house, see if it does the same thing.

Did the restorer change out the old 2 core power cable and fit a 3 core? If not, that will be the issue for sure.


 
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