Philips PM3243/PM3262/PM3263 Attenuator and Small Knob Wanted - UK Vintage Radio Repair and Restoration Discussion Forum

Chris55000 · 20th Mar 2024, 4:37 pm

Has anybody got a spare Philips PM3240/PM3262/PM3263 Series Oscilloscope Attenuator Assembly I can purchase please, together with the small brown variable gain knob and it's blue cap please?

I've just got a '3262 down from my devastation upstairs ready to move into our new shed, and it looks like the knob and shaft assembly got broken off somehow leaving a very fine sharp piece of wire sticking out!

It doesn't have to be working as long as the inner shaft and inner knob are available – the outer knob and stepped gain switch are fine!

Chris Williams

Chris55000 · 20th Mar 2024, 4:55 pm

PS!

. . .This is not the PM3260/PM3261/PM3265 series that's festooned full of ceramic hybrids by the way – this series uses signal amplifiers built of ordinary components up to the OM 540 Final Y Amplifier Module D602, which appears to be perfectly OK!

. . .The Attenuator is secured to the chassis assembly by one slotted nut and connects to the 'scope via a five way plug of the "Pye 725 Stocko" type, so they're not difficult to remove complete!

Chris Williams

20th Mar 2024, 4:37 pm	#1
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,874	Philips PM3243/PM3262/PM3263 Attenuator and Small Knob Wanted Has anybody got a spare Philips PM3240/PM3262/PM3263 Series Oscilloscope Attenuator Assembly I can purchase please, together with the small brown variable gain knob and it's blue cap please? I've just got a '3262 down from my devastation upstairs ready to move into our new shed, and it looks like the knob and shaft assembly got broken off somehow leaving a very fine sharp piece of wire sticking out! It doesn't have to be working as long as the inner shaft and inner knob are available – the outer knob and stepped gain switch are fine! Chris Williams Attached Thumbnails __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!

20th Mar 2024, 4:55 pm	#2
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,874	Re: Philips PM3243/PM3262/PM3263 Attenuator and Small Knob Wanted PS! . . .This is not the PM3260/PM3261/PM3265 series that's festooned full of ceramic hybrids by the way – this series uses signal amplifiers built of ordinary components up to the OM 540 Final Y Amplifier Module D602, which appears to be perfectly OK! . . .The Attenuator is secured to the chassis assembly by one slotted nut and connects to the 'scope via a five way plug of the "Pye 725 Stocko" type, so they're not difficult to remove complete! Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!