Search found 5696 matches

by simon
Mon May 20, 2024 9:35 am
Forum: Everyones Projects
Topic: Pye Sunrise Radio
Replies: 8
Views: 147

Re: Pye Sunrise Radio

Very interesting, thanks Morgan. Yes, now you say I think it's a MM, not M.

I'll have a look for dual concentric, it's not something I've ever played with. Are you think in "open baffle" style?
by simon
Sun May 19, 2024 8:20 pm
Forum: Everyones Projects
Topic: Pye Sunrise Radio
Replies: 8
Views: 147

Re: Pye Sunrise Radio

So what to do with it? My dad's going to have a go at the woodwork as it's up his street. There's no point even trying to recreate the internals I think. I guess originally there would have been a large paper driver and the case would be largely a U frame-type open baffle??? Bass cutoff would have b...
by simon
Sun May 19, 2024 8:08 pm
Forum: Everyones Projects
Topic: Pye Sunrise Radio
Replies: 8
Views: 147

Re: Pye Sunrise Radio

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This base appears to be to allow the radio to turn easily. I wonder if this was original?
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by simon
Sun May 19, 2024 8:06 pm
Forum: Everyones Projects
Topic: Pye Sunrise Radio
Replies: 8
Views: 147

Re: Pye Sunrise Radio

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by simon
Sun May 19, 2024 8:04 pm
Forum: Everyones Projects
Topic: Pye Sunrise Radio
Replies: 8
Views: 147

Re: Pye Sunrise Radio

Original markings are still visible inside the case
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by simon
Sun May 19, 2024 8:02 pm
Forum: Everyones Projects
Topic: Pye Sunrise Radio
Replies: 8
Views: 147

Pye Sunrise Radio

I picked up an old radio from Steve earlier. It's just the woodwork and needs a bit of TLC. I know nothing about old radios but I think it's a Pye Sunrise Model M from 1931, walnut veneer on plywood, so it's not bad for 93 years old. There's something quite special about the front I think. . 2024051...
by simon
Sat May 18, 2024 10:54 am
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

I bought a few 6AX4s from the US some years ago at a dollar a piece. I've used them successfully with a low voltage GM70 amp. Handily they're octals, but the 6.3V heaters are a pain. I could get some 6V transformers (they'd need to be good for the HT) but the cost will be approaching a 5V rectifier ...
by simon
Sat May 18, 2024 10:47 am
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

Thanks Steve, I've sent you a WhatsApp
by simon
Sat May 18, 2024 9:47 am
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

I've never used 5U4(G). They look to be in current production so there are cheaper options though NOS aren't too far behind GZ37s. Brimar has one at £55 which it describes as "modestly priced".
by simon
Fri May 17, 2024 8:01 pm
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

Great, I'll have 2 please...
by simon
Fri May 17, 2024 7:32 pm
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

£35 for a Hammond 6.3V 3A transformer. Either I'm getting tighter as I get older or this game's getting too expensive for my liking. Toroidy might be cheaper, but delivery will probably even it up compared to Mouser. Are toroids a bad idea for rectifiers? They're supposed to pass more noise than an ...
by simon
Fri May 17, 2024 6:42 pm
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

Mmm yes, good points.

A separate transformer would be better anyway...
by simon
Fri May 17, 2024 5:11 pm
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

On a separate note I do have some 6AX4 damper doodes but they need 6.3V heaters and the trafo only has one 6.3V winding which I don't want to share with a rectifier. Is there any reason not to use a bridge etc. to convert the 5VAC winding to 6.3VDC?
by simon
Fri May 17, 2024 5:09 pm
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

That's very kind of you Steve, and at my favourite price too! It might be a little while before I can get over but I'll be in touch.
by simon
Fri May 17, 2024 2:35 pm
Forum: Valves
Topic: Dying Rectifier?
Replies: 26
Views: 700

Re: Dying Rectifier?

Holy cow, when did GZ37s get so expensive? Something else I wish I'd bought a crate of 20 years ago...

Makes SiC diodes look cheap.