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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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18th Feb 2018, 10:49 am | #21 |
Triode
Join Date: Jan 2018
Location: Huntingdon, Cambridgeshire, UK.
Posts: 12
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Re: Blaupunkt Arkansas 43942 Restoration
Ok. I’ve put the ECL86 valves back in and powered up. Each are negative 0.9v on pin 1 and just under +5v on pin 7. Both of them are glowing.
Current reading has jumped up to about 260mA whereas it was only 150mA with the valves out. I’ve switched off for now just in case. Should I be concerned about anything? |
18th Feb 2018, 11:02 am | #22 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Blaupunkt Arkansas 43942 Restoration
Cathode voltages looks ok to me....do the Ohms law....I = V/R, if the cathode resistors are within spec then that means approx 33mA flowing through each valve which is well within their limits.
Lawrence. |
18th Feb 2018, 11:50 am | #23 |
Triode
Join Date: Jan 2018
Location: Huntingdon, Cambridgeshire, UK.
Posts: 12
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Re: Blaupunkt Arkansas 43942 Restoration
Thanks Lawrence.
I hadn’t checked those resistors. Probably should have done..! I’ve switched back on and everything seems stable after 30 mins or so. I’m going to put everything back together now and see whether we have sound.... |
18th Feb 2018, 4:54 pm | #24 |
Triode
Join Date: Jan 2018
Location: Huntingdon, Cambridgeshire, UK.
Posts: 12
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Re: Blaupunkt Arkansas 43942 Restoration
Good news! We have music!
Had it running for a few hours now without any major issues. Good VHF and MW reception. No nasty buzzing sounds or distortion. Volume on the left channel is stronger than right though, so that's going to need further investigation. I swapped the ECL86s over, but it's still stronger on the left. The autochanger has life in it too, but I'll take that out and refurb it over the next few weeks. Thanks again to everyone who's contributed to this thread. |
18th Feb 2018, 6:01 pm | #25 | |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Blaupunkt Arkansas 43942 Restoration
Quote:
Lawrence. Last edited by ms660; 18th Feb 2018 at 6:20 pm. Reason: missed stuff. |
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