HMV 2010 Fuzzy Sound - UK Vintage Radio Repair and Restoration Discussion Forum

Becky-C · 8th Jul 2020, 12:51 pm

Hi Guys.

I’ve got a HMV 2010 record player, I’ve got the desk running having stripped and lubricated the desk, it’s running really nicely.
The problem I have now is the amplifier is sounding a bit “scratchy” at lower volumes.
I’ve cleaned the pots and there’s no scratching noises when I change the controls now so I’m assuming they’re all good.
I’ve also plugged in my iPad into the tape input and the result is the same, so I’m assuming the fault is either with the speakers or the amp.
Would swapping the capacitors help with this problem? I’ve looked at the caps and nothing is bulging or leaking maybe they’re ok? The smoothing cap is probably ok, no hum on the amp.
Other possibility is the speakers are shot? The unit has been stored in a dry house all its life, so no damp garages etc..

Any help or pointers would be really appreciated, googling this think is tricky as the model number is also a year so I end up with pages of record players with questions asked in 2010!

Thanks

Bex.

Edward Huggins · 8th Jul 2020, 1:21 pm

I note you say "speakers" - are there 2 speakers in this player? A photo of the unit would help.

Nuvistor · 8th Jul 2020, 1:29 pm

Check the speaker cones for rubbing on the magnets, gently push the cone near it’s centre, If it’s rubbing you will feel and hear it.
Another possibility is crossover distortion if the audio output is push pull, check the bias adjustment.
Lots of other possibilities but those two come to mind for distortion at low volume.

This looks like the circuit.
https://www.service-data.com/product...93/3753/e12693

Edward Huggins · 8th Jul 2020, 2:58 pm

Ahh, now I see it, this player has 4 speakers. I can't remember if the cones in those Goodmans 6.5" bass/mid drivers had rubber, treated paper or foam surrounds....if foam they might have perished.

Becky-C · 8th Jul 2020, 6:45 pm

Thanks Guys I’ll whip the speakers off and take a look as soon as I can.
I’ve attached a quick snap as requested.
I think there might be 4 speakers as there is 4 grilles. 2 tweeters and 2 main ones.

AC/HL · 8th Jul 2020, 8:06 pm

This comes from the time that BRC used Callins capacitors. Easily checked, they are black plastic cylinders and by now they are change on sight. If the speakers check OK this is a good bet.

8th Jul 2020, 12:51 pm	#1
Becky-C Triode Join Date: Jul 2013 Location: Towcester, Northamptonshire, UK. Posts: 19	HMV 2010 Fuzzy Sound Hi Guys. I’ve got a HMV 2010 record player, I’ve got the desk running having stripped and lubricated the desk, it’s running really nicely. The problem I have now is the amplifier is sounding a bit “scratchy” at lower volumes. I’ve cleaned the pots and there’s no scratching noises when I change the controls now so I’m assuming they’re all good. I’ve also plugged in my iPad into the tape input and the result is the same, so I’m assuming the fault is either with the speakers or the amp. Would swapping the capacitors help with this problem? I’ve looked at the caps and nothing is bulging or leaking maybe they’re ok? The smoothing cap is probably ok, no hum on the amp. Other possibility is the speakers are shot? The unit has been stored in a dry house all its life, so no damp garages etc.. Any help or pointers would be really appreciated, googling this think is tricky as the model number is also a year so I end up with pages of record players with questions asked in 2010! Thanks Bex. __________________ You guys think Women are hard to understand? Its nothing compared to the circuit of a 40's Radio

8th Jul 2020, 1:21 pm	#2
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,339	Re: HMV 2010 Fuzzy Sound I note you say "speakers" - are there 2 speakers in this player? A photo of the unit would help. __________________ Edward.

8th Jul 2020, 1:29 pm	#3
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: HMV 2010 Fuzzy Sound Check the speaker cones for rubbing on the magnets, gently push the cone near it’s centre, If it’s rubbing you will feel and hear it. Another possibility is crossover distortion if the audio output is push pull, check the bias adjustment. Lots of other possibilities but those two come to mind for distortion at low volume. This looks like the circuit. https://www.service-data.com/product...93/3753/e12693 __________________ Frank

8th Jul 2020, 2:58 pm	#4
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,339	Re: HMV 2010 Fuzzy Sound Ahh, now I see it, this player has 4 speakers. I can't remember if the cones in those Goodmans 6.5" bass/mid drivers had rubber, treated paper or foam surrounds....if foam they might have perished. __________________ Edward.

8th Jul 2020, 6:45 pm	#5
Becky-C Triode Join Date: Jul 2013 Location: Towcester, Northamptonshire, UK. Posts: 19	Re: HMV 2010 Fuzzy Sound Thanks Guys I’ll whip the speakers off and take a look as soon as I can. I’ve attached a quick snap as requested. I think there might be 4 speakers as there is 4 grilles. 2 tweeters and 2 main ones. Attached Thumbnails __________________ You guys think Women are hard to understand? Its nothing compared to the circuit of a 40's Radio

8th Jul 2020, 8:06 pm	#6
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,642	Re: HMV 2010 Fuzzy Sound This comes from the time that BRC used Callins capacitors. Easily checked, they are black plastic cylinders and by now they are change on sight. If the speakers check OK this is a good bet.