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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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17th Jun 2019, 11:23 am | #21 |
Heptode
Join Date: Dec 2014
Location: Limerick, Ireland.
Posts: 901
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Re: Help to identify old Philips valve radio
It's got the separate VHF tuner (2 x EF80), and bottom scale looks like VHF.
It can't be Philips Ireland unless they were making or rebadging AM/FM sets for the few areas with VHF reception from UK. It looks like it has channel numbers on VHF, which would suggest a German import. I think VHF radio started just before VHF TV (which was 31st Dec 1961, 405 in areas that already had TVs for BBC/ITV and 625 VHF elsewhere.) There was also only simulcast with the sole Irish station, however BBC didn't have much more than simulcast of three stations till 1971 in most places. VHF-FM started in 1949 in Germany. |
17th Jun 2019, 11:24 am | #22 |
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio
4700 pF ? I will measure it out of circuit
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17th Jun 2019, 11:28 am | #23 |
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio
Ok its reading 5.32nF out of circuit so looks ok, so that is not my issue. Really need a schematic, the volume pot has been cleaned and its reading fine.
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17th Jun 2019, 11:28 am | #24 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Help to identify old Philips valve radio
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17th Jun 2019, 11:29 am | #25 |
Moderator
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Location: Ipswich, Suffolk, IP4, UK.
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Re: Help to identify old Philips valve radio
Valve line up please.
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17th Jun 2019, 11:30 am | #26 |
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio
The internal one that loops around the chassis, There is another place to plug it into on the back but when I use these two ports there is nothing at all, so I presume I have it connected to the correct place
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17th Jun 2019, 11:35 am | #27 |
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio
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17th Jun 2019, 11:41 am | #28 |
Heptode
Join Date: Dec 2014
Location: Limerick, Ireland.
Posts: 901
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Re: Help to identify old Philips valve radio
The piano key models came in about 1953/1954 in Germany. The Noval models also about 1954.
Also it has EM80 rather than EM34 style eye. It has to be a rare 1954 / 1955 model if it has the VHF and Noval as even in 1953 most were rimlock? |
17th Jun 2019, 11:42 am | #29 |
Dekatron
Join Date: Sep 2003
Location: Near Swindon, North Wiltshire, UK.
Posts: 3,596
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Re: Help to identify old Philips valve radio
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17th Jun 2019, 11:43 am | #30 |
Heptode
Join Date: Dec 2014
Location: Limerick, Ireland.
Posts: 901
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Re: Help to identify old Philips valve radio
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17th Jun 2019, 11:44 am | #31 |
Dekatron
Join Date: Sep 2003
Location: Near Swindon, North Wiltshire, UK.
Posts: 3,596
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Re: Help to identify old Philips valve radio
The "MKxxx xx" part numbers on the mains transformer and other parts are UK Philips part numbering.
It looks like the actual model number label has come adrift from the rear of the chassis (glue residue visible) and, I expect, the back cover as well. |
17th Jun 2019, 11:46 am | #32 |
Heptode
Join Date: Dec 2014
Location: Limerick, Ireland.
Posts: 901
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Re: Help to identify old Philips valve radio
Could be this model:
https://www.radiomuseum.org/r/philips_bif_571a.html I can't imagine very many people had VHF reception in 1958 in Ireland. |
17th Jun 2019, 11:52 am | #33 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,793
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Re: Help to identify old Philips valve radio
The tuner design is rather old fashioned for 1958.
Mike, when did RTE start VHF (presumably from Athlone)? I wondered above if this might have been the Philips Ireland launch model for the new service. |
17th Jun 2019, 12:10 pm | #34 | ||
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio
Quote:
Quote:
That is right, the label is missing, and nothing else on the back cover |
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17th Jun 2019, 12:15 pm | #35 | |
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Re: Help to identify old Philips valve radio. BIF 571A.
Quote:
Having downloaded the service from RM the OP will be in a position to check voltage readings starting with the rectifier, HT supply and output valve.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
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17th Jun 2019, 12:20 pm | #36 |
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio. BIF 571A.
I just gave the variable tuning capacitor metal plates another clean out and attached a long piece of speaker cable to the already installed VHF aerial (also cleaned plugs with fine sandpaper) and its got a bit louder, but still no where near what it should be(we do have bad FM reception here), I also checked the rest of the black style capacitors (value of 1 is unreadable and two can caps, one 100uF was reading 168uf so replaced this. The rest seem ok( out of circuit), but should probably replace all the black ones with 400v film caps. And also the main filter cap, 50+50uF can cap has two poles on top, and I presume the metal case it the common negative.
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17th Jun 2019, 12:25 pm | #37 |
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio. BIF 571A.
Also forgot to mention the pilot light is blown, the one to illuminate the dial, I presume this does not double up as some sort of fuse?
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17th Jun 2019, 12:34 pm | #38 |
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Re: Help to identify old Philips valve radio. BIF 571A.
If the pilot light were a fuse the radio wouldn't work at all.
If you're going to replace components, rather than using fault finding procedures, I suggest you start with the audio coupling capacitors C52 and C54. If these are electrically leaking they may destroy the output transformer, output valve and mains transformer.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
17th Jun 2019, 12:41 pm | #39 |
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Re: Help to identify old Philips valve radio. BIF 571A.
Circuit extract attached.
I note that the radio has a Pick Up (PU) socket. If you switch to gram and touch the socket with a screwdriver blade a LOUD buzz will indicate that the audio stages are working correctly.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
17th Jun 2019, 1:04 pm | #40 |
Triode
Join Date: Sep 2018
Location: Killarney, Co. Kerry, Republic of Ireland
Posts: 27
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Re: Help to identify old Philips valve radio. BIF 571A.
Hi, yes it has 2 x two sets of sockets at the bottom of the chassis, I was wondering what these were for, I used a screwdriver and there is no loud buzz when set to gramophone from either sockets, so an issue with the output stage?
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