Philips Modulator PM5680 - UK Vintage Radio Repair and Restoration Discussion Forum

chriswood1900 · 13th Aug 2011, 8:38 pm

I recently aquired in a job lot of surplus 2 Philips PM5680 modulators, on exmination they are clearly not standard modulators but in the limited info I can find on the web intended for broadcast or comercial use. I wondered if anyone on the forum knew more about these units, my first reaction was to break them for spares as they have nice cases for a project and lots of good quality components. However I do like to check before vandalising something. Perhaps keep them for 25yrs for 625 alive on CH21!!
All advice gratefully received. Chris

Andy Green · 20th Aug 2011, 1:59 pm

I'd keep one working one anyway, 25 years passes quicker than you might think!

Danny · 26th Aug 2011, 8:46 am

Hi i would find a manual or more info before killing these .Thay may be multi standard which would make them very handy. if you dont need them yourself i recon quite a few on here would like one to play with. Danny

Hybrid tellies · 26th Aug 2011, 1:27 pm

No don't scrap them. I am sure there will be a few interested parties from this forum alone.

Andy Doz · 26th Aug 2011, 1:52 pm

I saw some similar at a rally a few years ago, and they generated proper vestigial sideband .

chriswood1900 · 27th Aug 2011, 3:54 pm

Thanks for the replies, I won't scrap them, can anyone help with a manual? On the limited data I could find mainly in German they seemed to be designed for feeding a transmitter. Regards Chris

13th Aug 2011, 8:38 pm	#1
chriswood1900 Octode Join Date: Jan 2007 Location: Dorridge, West Midlands, UK. Posts: 1,445	Philips Modulator PM5680 I recently aquired in a job lot of surplus 2 Philips PM5680 modulators, on exmination they are clearly not standard modulators but in the limited info I can find on the web intended for broadcast or comercial use. I wondered if anyone on the forum knew more about these units, my first reaction was to break them for spares as they have nice cases for a project and lots of good quality components. However I do like to check before vandalising something. Perhaps keep them for 25yrs for 625 alive on CH21!! All advice gratefully received. Chris Attached Thumbnails

20th Aug 2011, 1:59 pm	#2
Andy Green Hexode Join Date: Jan 2005 Location: Waterford, Republic of Ireland Posts: 258	Re: Philips Modulator PM5680 I'd keep one working one anyway, 25 years passes quicker than you might think!

26th Aug 2011, 8:46 am	#3
Danny Heptode Join Date: Jul 2003 Location: North Walsham, Norfolk, UK. Posts: 516	Re: Philips Modulator PM5680 Hi i would find a manual or more info before killing these .Thay may be multi standard which would make them very handy. if you dont need them yourself i recon quite a few on here would like one to play with. Danny

26th Aug 2011, 1:27 pm	#4
Hybrid tellies Nonode Join Date: Jan 2004 Location: 1966-1976 Coverack in Cornwall and Helston Cornwall. 1976-present Bristol/Bath area. Posts: 2,946	Re: Philips Modulator PM5680 No don't scrap them. I am sure there will be a few interested parties from this forum alone. __________________ Simon BVWS member

26th Aug 2011, 1:52 pm	#5
Andy Doz Hexode Join Date: Feb 2011 Location: Gloucestershire, UK. Posts: 376	Re: Philips Modulator PM5680 I saw some similar at a rally a few years ago, and they generated proper vestigial sideband .

27th Aug 2011, 3:54 pm	#6
chriswood1900 Octode Join Date: Jan 2007 Location: Dorridge, West Midlands, UK. Posts: 1,445	Re: Philips Modulator PM5680 Thanks for the replies, I won't scrap them, can anyone help with a manual? On the limited data I could find mainly in German they seemed to be designed for feeding a transmitter. Regards Chris