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UK Vintage Radio Repair and Restoration... - www.vintage-radio.net | Site profile
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UK Vintage Radio Repair and Restoration Discussion Forum - Powered by
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Top authors on UK Vintage Radio Repair and Restoration Discussion Forum - Powered by
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user's latest post:
LED/Valve cathode bias? - Page 2...
Published (2009-11-08 20:17:00)
I think I get it... the Y is worked out by What current would be draw if 2k2 was dropped across 300V. the X simply states that it`s 300 V, and line is drawn between the 2 points. Then I look at the `g` line(s) that were there before we did the load line, and from those I can see what current gain will be had for every 2.5v increment. from this particular example we can infer that at just below -17.5v there will be little to no anode current at...
user's latest post:
Art Deco Icons Casa Del Rio
Published (2009-11-06 22:24:00)
Quote: Originally Posted by David G4EBT I guess we have to realise that for some years until their renaissance as classic receivers, they went through a phase when they didn't have classic status or great appeal. There is a round Ekco (A22 I think) on the sideboard in many early episodes of Till Death Us Do Part . The implication is clearly that Alf Garnett is a skinflint still using a tatty old prewar radio. Paul
user's latest post:
Dynatron RP transformer.
Published (2009-11-08 22:32:00)
Nice to see it at home with all your other beautiful radios, Geoff
user's latest post:
no volume on Radiomobile 1085 -...
Published (2009-11-08 22:27:00)
Looks like it. Up to you whether you change it or not. I would do anyway, but if you don't then it's no great shakes. Cheers, Steve P.
user's latest post:
Pye Black box on council tip!
Published (2009-11-08 11:19:00)
That 'restoration' should take about five minutes Trevor! John.
user's latest post:
Pioneer PL-12D tonearm setdown.
Published (2009-11-08 23:35:00)
Quote: Originally Posted by Randlepmcmurphy It's a bit of a nightmare as I have to get up and lift the arm up and put it on its rest after every side. Perhaps I've missed something but why is it a nightmare to have to get up and move the tonearm? Surely at the end of play you have to get up anyway to either change the record or turn it over. Anyway, as others have said, treat yourself to a new stylus and stick with this deck. In its...
user's latest post:
Pye Black box on council tip!
Published (2009-11-08 21:51:00)
Hi. I think this one must have been used within the last five or so years, the deck was absolutely fine with all speeds and changer mech working fine, the only thing really is the mains transformer and the valve bases being a little bit dirty. The cabinet although slightly scratched and dusty cleaned up very well and a little polish made all the difference. I wll post a few pictures tomorrow, infact I brought it in tonight and played about 20,...
user's latest post:
Cameras on Antiques Roadshow
Published (2009-11-08 21:51:00)
Yes I saw that too. Apparently the collector had a 100 more of them of various vintage kept in a barn and an old BBC outside broadcast lorry as well. Amazing. Howard
user's latest post:
Scrapped microwave oven
Published (2009-11-07 20:34:00)
Some time ago there was an item that I saw *somewhere* on dragging the magnetron onto an amateur frequency. (2250MHz? Very long time since I've used my license.) IIRC the problem wasn't so much the frequency being shifted but getting rid of the excess power.
user's latest post:
GPO 746 conversion HELP!!???!!
Published (2009-11-08 23:55:00)
Quote: Originally Posted by Ambassador You seem to suggest even if this works its not a long term solution: " ...don't be tempted to leave the phone wired in this way ". Taking into account my theoretical setup, is there the potential to cause damage if the onboard capacitor is used long-term? Don't see why. You'd effectively be placing a series C - L - R bell-circuit (formed by the original telephone...
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Top 10 active forums on UK Vintage Radio Repair and Restoration Discussion Forum - Powered by
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Top 10 forums on UK Vintage Radio Repair and Restoration Discussion Forum - Powered by
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Vintage Television and Video
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Vintage Radio (domestic)
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Vintage Audio (record players, hi-fi etc)
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Sets and Parts Wanted (private buyers only)
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Sets and Parts Offered (private sellers only, exact price required)
- 7,814 posts
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Information and Service Data Wanted
- 6,653 posts
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Components and Circuits
- 6,312 posts
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General Vintage Technology Discussions
- 6,198 posts
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- 5,675 posts
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- 4,666 posts
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Latest active threads on UK Vintage Radio Repair and Restoration Discussion Forum - Powered by
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Started 2 days, 17 hours ago (2009-11-07 20:07:00)
by mark pirate
Nice find John!
It's amazing what people consider junk
These are a lovely bit of kit, i have owned mine for 30 years!
Will be following the restoration with interest.
Mark
Started 20 hours, 25 minutes ago (2009-11-09 17:22:00)
by Mike-repairman
An expensive option to employ someone to do it; with the help from some on here you may be able to do it yourself.
What was wrong with it?
A good service of the mechanics and switching normally restores most functions.
Mike.
Started 3 days, 2 hours ago (2009-11-07 11:42:00)
by kalee20
Well, it's not the best of circuits, because the valve will only get 1.6V of bias or so. At this level of bias, a 6BW6 will pass a couple of tens of milliamps, which is fine for the LED.
If you remove the LED, the cathode will float up to its cut-off voltage, which may be a few tens of volts - enough to give you a mild belt, even if the current is limited.
Incidentally, the connectio of...
Started 22 hours, 43 minutes ago (2009-11-09 15:04:00)
by toshiba tony
whoops, who have i upset, or have i broken forum rules, SORRY
Started 1 week, 5 days ago (2009-10-28 22:45:00)
by AndiiT
Hi,
New cases and cosmetic parts for 700 type phones occasionally crop up on eBay.
Also try asking at the THG site or the ITN Forums
Regards
Andrew
Started 21 hours, 38 minutes ago (2009-11-09 16:09:00)
by astral highway
Quote:
Originally Posted by georgesgiralt
Should I make some modifications to the number of turns or should I leave it untouched ?
Georges, a degree of trial-and-error will be needed, but this hasn't put you off in the past!
What is the operating frequency of the cct?
I have made several high-...
Started 21 hours, 41 minutes ago (2009-11-09 16:06:00)
by Robert G0UHF
Hi Tony,
Pretty sure they only came in cream and that the answer is no. It was probably done at the same time as the power modifications as you have already surmised. If Ever Ready did make the set in green then they must be very rare.
Regards
Started 6 days, 1 hour ago (2009-11-04 12:19:00)
by 1958chip
Hacker IF alignment help needed
I have a Helmsman RP36 which had poor sound due to if allignment -tunes oddly with more than one best spot on a station. The service sheet advises that the transformers shoud be adjusted to get a flat response i.e. not all tuned to 470 kHz. Is there a best way of doing this as there are a lot of choices in ...
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Hot threads for last week on UK Vintage Radio Repair and Restoration Discussion Forum - Powered by
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Started 2 weeks, 2 days ago (2009-10-24 23:25:00)
by Steve_P
This could be a number of things, so if you are to have a go yourself you need some fault finding skills. What skills do you have?
Is the faint sound from inside the radio or from the speaker. Sometimes a faint sound can be heard from insside the radio, but this is not really relevant. Does any sound come from the speaker?
It could be the Output Transistors, You could have a faulty ...
Started 4 days, 2 hours ago (2009-11-06 11:35:00)
by cmjones01
The Neutral wire to your house is shared with lots of other people. Imagine
it gets broken somewhere between your house and the substation. Where does
the return current from everyone else's house flow then? Through the
chassis of your radio and its mains lead. Now your local earth probably has
a dangerous voltage on it and the mains lead has probably caught fire.
That's why this arrangement ...
Started 6 days, 17 hours ago (2009-11-03 20:19:00)
by Laurdys
something like bicarbonate of soda should work
Started 1 week ago (2009-11-03 08:06:00)
by ppppenguin
Congratulations on your purchase and welcome to the world of pre-war TVs. You say you are a complete TV novice so this is an unusual place to start. First and foremost - are you fully aware of the dangers of mains derived EHT? This is genuinely lethal. You don't usually get a second chance and we don't like losing forum members.
Do you have full service data? Forum member BrianC has done a ...
Started 6 days, 18 hours ago (2009-11-03 19:24:00)
by paulsherwin
This sounds like mains borne interference. I had very similar symptoms a few years ago. The best approach is to go exploring with a transistor radio, both inside the house and outside it. Mains borne interference will generally be on your house phase, so you should hear a peak at roughly every third house as you walk down the street.
Unfortunately it's very difficult to get your electricity ...
Started 3 days, 2 hours ago (2009-11-07 11:42:00)
by kalee20
Well, it's not the best of circuits, because the valve will only get 1.6V of bias or so. At this level of bias, a 6BW6 will pass a couple of tens of milliamps, which is fine for the LED.
If you remove the LED, the cathode will float up to its cut-off voltage, which may be a few tens of volts - enough to give you a mild belt, even if the current is limited.
Incidentally, the connectio of...
Started 1 week, 3 days ago (2009-10-30 23:53:00)
by Peter.N.
Not really a very good picture, well not on my computer anyway, its
obviously something '50s I can see the EY51.
Started 3 weeks, 1 day ago (2009-10-18 21:53:00)
by Oldtestgear
I may have a spare EPROM in my spares box. Do you have an EPROM reader to do a checksum on the suspect EPROM?
I will look tomorrow & send you a message. My 1604 has a problem with Channel 1 i/p. Could you let have a copy of the schematics?
Will get back to you.
Phil
Started 2 days, 17 hours ago (2009-11-07 20:07:00)
by mark pirate
Nice find John!
It's amazing what people consider junk
These are a lovely bit of kit, i have owned mine for 30 years!
Will be following the restoration with interest.
Mark
Started 5 days, 15 hours ago (2009-11-04 22:10:00)
by mark pirate
Try one of those cylinder shape low wattage (150w) space heaters, it won't
be warm enough to work in, but will help keep your collection from cold & damp.
Mark
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