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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc. |
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Thread Tools |
22nd Mar 2019, 2:52 pm | #21 |
Heptode
Join Date: Jun 2018
Location: Carmarthenshire, Wales, UK.
Posts: 569
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Re: Hmv 2208
On the plus side 2 yellow one to speaker transformer and one to main board on right cycle side grey to mains transformer no4 on left circle side grey and yellow to mains transformer no3 right hand side circle 2 blacks not sure how to test do not want to make things worse I enclose picture of rectifier
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22nd Mar 2019, 3:22 pm | #22 | |
Dekatron
Join Date: Sep 2003
Location: Near Swindon, North Wiltshire, UK.
Posts: 3,621
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Re: Hmv 2208
Quote:
As you've unscrewed it from the chassis, don't leave it running for more than the time it takes to get the meter reading (seconds, not minutes), as the chassis of the recorder acts as a heatsink for the rectifier. |
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22nd Mar 2019, 5:04 pm | #23 |
Heptode
Join Date: Jun 2018
Location: Carmarthenshire, Wales, UK.
Posts: 569
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Re: Hmv 2208
Ok tested as you said but readings are low connected to cycle 10.6v connected to+and- 6v I don't understand why this is
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22nd Mar 2019, 5:17 pm | #24 | |
Dekatron
Join Date: Sep 2003
Location: Near Swindon, North Wiltshire, UK.
Posts: 3,621
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Re: Hmv 2208
Quote:
Now, as the valve heaters and meter lamp work, the mains transformer is getting 240v ac to its primary winding. The next thing I would do is, WITH THE RECORDER UNPLUGGED FROM THE MAINS SUPPLY, measure the resistance of the HT winding of the mains transformer. If you follow the wires connected to the bridge rectifier’s “S” terminals, they must both go to terminals on the mains transformer. Connect your meter, set to measure Ohms, to these two terminals and you should get a reading of 120 Ohms. |
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22nd Mar 2019, 5:43 pm | #25 |
Heptode
Join Date: Jun 2018
Location: Carmarthenshire, Wales, UK.
Posts: 569
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Re: Hmv 2208
Ok followed wires set meter to ohms and no reading at all on any ohms setting I have 3 multimeter and all same zero I must thank you but it looks like mains transformer not working do you think
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22nd Mar 2019, 6:49 pm | #26 | |
Dekatron
Join Date: Sep 2003
Location: Near Swindon, North Wiltshire, UK.
Posts: 3,621
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Re: Hmv 2208
Quote:
However, all is not lost, as I have found a broken wire where it emerges from the windings to be soldered onto the terminals. So, have a close inspection to see if that is the case with your transformer. If it is, with care, it can usually be repaired. It might even be the case that the wire from the transformer windings isn’t properly soldered to the solder terminal. Last edited by dazzlevision; 22nd Mar 2019 at 7:13 pm. |
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22nd Mar 2019, 10:43 pm | #27 |
Heptode
Join Date: Jun 2018
Location: Carmarthenshire, Wales, UK.
Posts: 569
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Re: Hmv 2208
I can't thank you enough for this help I will let you know if it is reparable thanks
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22nd Mar 2019, 11:36 pm | #28 |
Dekatron
Join Date: Sep 2003
Location: Near Swindon, North Wiltshire, UK.
Posts: 3,621
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Re: Hmv 2208
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