What are they game again ???

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11-06-2018, 17:10
andyrlb

What are they game again ???

They’re pretty big 780mm X 420mm x 360mm, the cabinets are 28mm thick ,they weigh a ton and are finished in ......
Formica [emoji23]
Wtf are these ?? https://uploads.tapatalk-cdn.com/201...e175cb46c.heic https://uploads.tapatalk-cdn.com/201...6cf55df34.heic https://uploads.tapatalk-cdn.com/201...d302adfcd.heic

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11-06-2018, 17:41
struth

imf's ?
11-06-2018, 17:48
andyrlb

Quote:

Originally Posted by struth

imf's ?

I did wonder [emoji848]

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11-06-2018, 17:49
andyrlb

Quote:

Originally Posted by andyrlb

I did wonder [emoji848]

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The sound ! Wow [emoji50]

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11-06-2018, 17:52
struth

remind me of ones they made with a resistive line tunnel . forgot the name... they will likely go low and be very decent
11-06-2018, 17:55
struth

irving m fried
11-06-2018, 17:59
Lawrence001

They're probably diy, there were a lot of designs using similar drive units published at the time in magazines like Hifi Answers. The B139s were common with the celestion and coles tweeters, they usually came with a B110 mid range, but these ones are different. The one on the right looks like a bit like a Goodmans but I've never seen it with the suspension in white. The one on the left looks vaguely familiar but I can't quite place it. Although it's possibly another Goodmans that's had the surrounds replaced with rubber. The B139 with the white surround is a very early example, the other one is the more common early variety. It's probable one of these has been replaced in the past.

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11-06-2018, 18:02
walpurgis

Quote:

Originally Posted by Lawrence001

They're probably diy, there were a lot of designs using similar drive units published at the time in magazines like Hifi Answers. The B139s were common with the celestion and coles tweeters, they usually came with a B110 mid range, but these ones are different. The one on the right looks like a Goodmans but I've never seen it with the suspension in white. The one on the left looks vaguely familiar but I can't quite place it. Although it's possibly another Goodmans that's had the surrounds replaced with rubber. The B139 with the white surround is a very early example, the other one is the more common early variety. It's probable one of these has been replaced in the past.

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Both mids are EMI. One has faded. Some IMF models used similar.
11-06-2018, 18:07
andyrlb

Quote:

Originally Posted by walpurgis

Both mids are EMI. One has faded. Some IMF models used similar.

Getting excited now boys [emoji16]
Keep it up

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11-06-2018, 18:15
walpurgis

I suspect the B139 with the convex white foam surround is original, as it's an early version. The other with what appears to be a concave black rubber surround is later and was probably a replacement. The white surrounds were known to harden and perish.
11-06-2018, 18:17
andyrlb

Off subject lads but can you please tell me what the name of this antenna/aerial connection is called?https://uploads.tapatalk-cdn.com/201...30128f489.heic

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11-06-2018, 18:20
struth

looks like a bnc
11-06-2018, 18:23
walpurgis

Quote:

Originally Posted by struth

looks like a bnc

Thought they made Morris Minors? :scratch: ;)
11-06-2018, 18:24
andyrlb

Quote:

Originally Posted by walpurgis

Thought they made Morris Minors? :scratch: ;)

He’s right [emoji1303]
Cheers Grant

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11-06-2018, 18:28
andyrlb

Can anyone make sense of these ? Which is positive and negative?https://uploads.tapatalk-cdn.com/201...8d089e764.heic

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11-06-2018, 18:35
Macca

I reckon the speakers are IMF TLS50 with some replacement drivers. Like Lawrence says, DIY/kit build. I've got some that need recapping to be fully good to go but they are still pretty impressive. The bass power on them is just stupid as I suppose you've already found out.
11-06-2018, 18:36
andyrlb

Quote:

Originally Posted by Macca

I reckon the speakers are IMF TLS50 with some replacement drivers. Like Lawrence says, DIY/kit build. I've got some that need recapping to be fully good to go but they are still pretty impressive. The bass power on them is just stupid as I suppose you've already found out.

Yes Martin I have discovered just that [emoji16]
Putting the pmc’s to shame

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11-06-2018, 18:37
walpurgis

Many amps have a common neg, so use a meter on the speaker terminals and on a metal screw on the steel casing to identify negatives.

You could also look inside, as you have DIN speaker sockets there. The small pin hole on those is the positive and the inside wiring probable goes to the bigger terminal posts too, identifying positives.
11-06-2018, 18:40
andyrlb

Quote:

Originally Posted by walpurgis

Many amps have a common neg, so use a meter on the speaker terminals and on a metal screw on the steel casing to identify negatives.

You could also look inside, as you have DIN speaker sockets there. The small pin hole on those is the positive and the inside wiring probable goes to the bigger terminal posts too, identifying positives.

Cheers Geoff

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11-06-2018, 18:40
walpurgis

I'm wondering if the speakers were made by Lockwood. They are generally associated with Tannoy, but that's not to say exclusively and those formica laminates look very Lockwood like.
11-06-2018, 18:41
andyrlb

Quote:

Originally Posted by walpurgis

I'm wondering if the speakers were made by Lockwood. They are associated with Tannoy, but that's not to say exclusively and those formica laminates look very Lockwood like.

I haven’t found any IMF’s like them

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11-06-2018, 19:01
andyrlb

Well I think I agree with Lawrence in that they are some kind of kit speakers

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11-06-2018, 19:03
walpurgis

Does this look familiar? :)

http://www.usaudiomart.com/details/6...mages/1570524/

Looks like you now own two pairs of Radford speakers.
11-06-2018, 19:06
andyrlb

Quote:

Originally Posted by walpurgis

Does this look familiar? :)

http://www.usaudiomart.com/details/6...mages/1570524/

Looks like you now own two pairs of Radford speakers.

Ambulance please

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11-06-2018, 19:07
andyrlb

More Radfords too ! What a coincidence

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11-06-2018, 19:09
andyrlb

The dimensions are identical

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11-06-2018, 19:48
andyrlb

Same crossover https://uploads.tapatalk-cdn.com/201...ab1fd53e2.heic

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11-06-2018, 20:56
Lawrence001

That's where I've seen the mids from, Maxims!

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11-06-2018, 20:59
andyrlb

Quote:

Originally Posted by Lawrence001

That's where I've seen the mids from, Maxims!

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Ok you knowledgeable lot , could someone point me in the right direction for the correct capacitors for these Radfords ? Please https://uploads.tapatalk-cdn.com/201...26871fb64.heic

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11-06-2018, 21:00
andyrlb

Quote:

Originally Posted by andyrlb

Ok you knowledgeable lot , could someone point me in the right direction for the correct capacitors for these Radfords ? Please https://uploads.tapatalk-cdn.com/201...26871fb64.heic

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I know where to get them , what I mean is what do I replace them with?

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11-06-2018, 23:00
Lawrence001

I imagine Alcaps of the same values from Falcon Acoustics will work fine.

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11-06-2018, 23:03
walpurgis

I agree about Alcaps. They may be cheaper from Cricklewood Electronics on ebay though.
12-06-2018, 02:32
struth

Quote:

Originally Posted by walpurgis

Does this look familiar? :)

http://www.usaudiomart.com/details/6...mages/1570524/

Looks like you now own two pairs of Radford speakers.

good find.

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