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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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26th Jun 2020, 6:10 pm | #21 |
Pentode
Join Date: Nov 2019
Location: Tewkesbury, Gloucestershire, UK.
Posts: 173
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Re: Marconiphone 222 Restoration
Hi
Update Have finished the wiring today, was unable to get correct wire colours but will buy some shrink sleeving and change wires to correct colouring bit later, as it is wired at the moment Blue wire replaced ------ Yellow / Black --1.5V Brown wires --------- replaces the 2 Black / Red wires (which were linked together externally) to 1 black/red wire ------166 v Red wire still Red wire ------------ 72v Grey wire replaced ------yellow wire ------ 9v Connected up and plugged into the battery eliminator today and tested Results ;- The instrument panel light has has come on o.k (no smell of burning or anything) could not see any illumination from valves (but very bright today at moment) Have noticed that if you touch / wiggle the wires plugged in to battery eliminator a clicking noise can be heard from speaker Have attached pictures of how wired into battery eliminator think i have connected correctly ? Radio not working at present Any suggestions Clive Last edited by real0real; 26th Jun 2020 at 6:18 pm. |
26th Jun 2020, 7:19 pm | #22 |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Marconiphone 222 Restoration
You can work out if the way you wired the battery eliminator is correct by measuring anode and screen voltages across the various valve pins and comparing them to the ones specified in the trader sheet. If the valve heaters are on the the bulbs are on you've done something right.
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26th Jun 2020, 7:59 pm | #23 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
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Re: Marconiphone 222 Restoration
Hi, voltages on HT-, LT- and GB+ are all commoned on the eliminator, but may not be in the set. you should plug in the HT- and GB+ wires.
The QPP/ Screen grid wires are not connected to W,X, etc See if that helps Ed |
27th Jun 2020, 12:44 pm | #24 |
Pentode
Join Date: Nov 2019
Location: Tewkesbury, Gloucestershire, UK.
Posts: 173
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Re: Marconiphone 222 Restoration
Hi Ed
Bit confused as plugged in all the original leads that exit from the set into the terminals on the battery eliminator which i think are the correct terminal points (should mention that there was not a yellow/black lead from originals wires only black possible yellow has faded away to being just black of the original wires but now have replaced with blue wire), all the others were o.k and colours were just about visible as fabric braiding rotted away do i need to make a couple of leads to feed in for GB and HT inputs ? Clive |
27th Jun 2020, 9:21 pm | #25 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
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Re: Marconiphone 222 Restoration
Hi Clive, there is usually a bunch of leads together on these sets that all eventually connect to chassis. These are the GB+, HT- (sometimes via fuse bulb) and LT-.
It should work with only the LT- connected but have a check for the other leads and see. There should also be the leads from the output valve screen grid connections. Time for a few voltage readings. Any clicks or crackles? Ed |
27th Jun 2020, 11:38 pm | #26 |
Pentode
Join Date: Nov 2019
Location: Tewkesbury, Gloucestershire, UK.
Posts: 173
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Re: Marconiphone 222 Restoration
Hi Ed
Checked valves with the lights switched off tonight , anable to see any light from them so possibily not working/powering on Am getting slight click / crackle noises if i switch over channel knob on front of radio for a secound , plus tap the wire leads that fit into the battery eliminator (wiggle) Have checked voltage exiting battery eliminator with the leads plugged in , and to chassis of radio , for the red lead where sould be 72v only getting a reading of approx 10v and for the 166 v only getting a reading of approx 125v , could this be a fault or just power drain when under load ? Clive Last edited by real0real; 27th Jun 2020 at 11:45 pm. |
3rd Aug 2020, 9:28 pm | #27 | |
Pentode
Join Date: May 2019
Location: Galway, Republic of Ireland.
Posts: 208
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Re: Marconiphone 222 Restoration
Quote:
TT |
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4th Aug 2020, 6:57 am | #28 |
Octode
Join Date: Oct 2019
Location: Stockport, Greater Manchester, UK.
Posts: 1,646
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Re: Marconiphone 222 Restoration
Did you ever get this working Clive?
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4th Aug 2020, 9:12 pm | #29 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
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Re: Marconiphone 222 Restoration
Hi Clive , just seen your post of 27 June, did you resolve the voltage readings?
Ed |