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Old 8th Apr 2021, 7:57 pm   #21
ms660
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Default Re: Philips P3G38T Stone Dead

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Cheers, Any idea how to remove the metal bracket from the switch assembly ?
No idea, I don't remember ever working on one of those receivers.

Lawrence.
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Old 9th Apr 2021, 7:20 pm   #22
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Default Re: Philips P3G38T Stone Dead

Well after spending a ton of time on this radio its working again, Repaired the band switch. But still nothing on LW. And repaired quite a lot of broken wires. Problem is when the radio is out of the chassis the front panel which houses the controls and the ferrite rod hangs off the main PCB. Hence the broken connections, I replaced the mixer/osc with a ASY27. But the radio is still a bit deaf, Probably due to the ASY27 Having a gain of around 30 and the original AF117 stated as being no lower than 50 hfe.

Wasn't easy to change as it was buried under a lot of wiring, I'll pop something else in with more gain when i get a chance.
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Help. The dial cord on my bush TR82C has snapped.
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Old 9th Apr 2021, 7:49 pm   #23
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Default Re: Philips P3G38T Stone Dead

I doubt if the transistor gain is significant. Given that LW doesn't work and you are confident the wavechange switch is OK, I suspect there is a fault with the wiring to the ferrite rod coils.
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Old 9th Apr 2021, 7:56 pm   #24
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Default Re: Philips P3G38T Stone Dead

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I doubt if the transistor gain is significant. Given that LW doesn't work and you are confident the wavechange switch is OK, I suspect there is a fault with the wiring to the ferrite rod coils.
I'm confident the MW Part is working, The band switch is a nightmare to work on. It still has the original AF117's in the I'F Strip, That could be another cause of deafness. Gonna take a break from it for a few days as its consuming to much of my time,


Cheers
Jay
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Old 9th Apr 2021, 8:02 pm   #25
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Default Re: Philips P3G38T Stone Dead

You should certainly do the other AF117s. If one of them is knackered then the others probably are too, as they will be from the same production batch and will have experienced the same environmental conditions.
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Old 9th Apr 2021, 8:12 pm   #26
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Default Re: Philips P3G38T Stone Dead

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You should certainly do the other AF117s. If one of them is knackered then the others probably are too, as they will be from the same production batch and will have experienced the same environmental conditions.
The original AF117 mixer/osc was working but seemed a bit flakey. And i thought it could have been the cause of low gain hence why i changed it. They're better changed anyhow to eliminate future problems,

The set has an external aerial socket i'll try hooking that up and see if LW kicks in.


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