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Old 26th May 2019, 9:40 am   #1
Stuart R
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Hello,

I'm taking a look at a Strad PW461 for a friend.

On dismantling the set, I've noticed a sheet of copper foil is taped inside the bottom of the Bakelite case, it sits below the valve holders, rather than the IF/RF section which has its own metal screen. Don't be fooled as I was by the smaller brown rectangle, that's my table cloth!

Smoothing caps don't want to reform fully, but after tacking on a new coupling cap to the output valve, bypassing the open circuit mains switch and repairing a broken wire in the speaker loom, I have some sounds.

There isn't much mention of these of the forum. Does anyone know if the copper foil is original, or an add-on? I can see the phantom twiddler has been at the MW oscillator!

Thanks & Regards,

SR
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Old 27th May 2019, 5:58 pm   #2
Electronpusher0
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Default Re: Strad PW461 - Copper Foil?

That looks like a later add on using masking tape.
Peter
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Old 27th May 2019, 7:37 pm   #3
Andrewausfa
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Default Re: Strad PW461 - Copper Foil?

I believe it's an original part, mine show remnants of where the foil was glued.

Andrew
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Old 27th May 2019, 9:41 pm   #4
vidjoman
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Default Re: Strad PW461 - Copper Foil?

Looks like it’s a screen as it seems to connect to the chassis

Added - when the chassis is screwed in place. You can see the bright copper where the chassis brackets were touching it.
It may have been glued in at some time but later someone added the masking tape to stop it curling up.

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Old 27th May 2019, 9:49 pm   #5
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Default Re: Strad PW461 - Copper Foil?

Ok, so the masking tape is later.
(sounds of man eating humble pie)

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Old 27th May 2019, 11:10 pm   #6
Stuart R
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Default Re: Strad PW461 - Copper Foil?

Thanks Andrew, hope your set was already dismantled for the photograph, I'm grateful for you taking the time to post it.

No need to eat your humble pie, Peter. Being held in with crudely-torn masking tape I wondered if it was an add-on, coupled with the fact there's been some tweaking, maybe this set had (or will have) some issues.

Yes vidjoman, the chassis has two metal bars along the bottom that will make good contact with the foil when everything is screwed in. The big problem is getting the chassis out as the heavy end with the mains transformer catches on a bit of foil every time. Maybe time for some new masking tape with neatly-cut edges?

Will probably be a while before there's an update, but was pleased to get a few stations on 2 of 3 wavebands the other night, means that most of the hard-to-source wound components are intact.

Regards,

SR
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Old 27th May 2019, 11:44 pm   #7
Andrewausfa
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Default Re: Strad PW461 - Copper Foil?

No problem Stuart, it was taken a few years ago when I was restoring my one. One of my favourite radios actually, it looks like an old radio if that makes any sense. There's just something about the PW461 which strikes a chord with me.

Andrew
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Old 28th May 2019, 9:41 am   #8
Herald1360
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Default Re: Strad PW461 - Copper Foil?

Restick it invisibly with Evostik or maybe double sided mounting tape neatly round the edges plus a bit or two in the middle.

Or perhaps replace it with adhesive copper tape?
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