Photos; PYE PF91, PF91A and Electrohome info. - UK Vintage Radio Repair and Restoration Discussion Forum

bolly · 15th Apr 2007, 4:54 pm

figured I'd post a pic of mine as I couldn't find a pic of one here;

http://i14.photobucket.com/albums/a3...G_0867copy.jpg

Trevor · 15th Apr 2007, 7:42 pm

Please show us a picture of the internal wiring
Regards Trev

bolly · 15th Apr 2007, 8:04 pm

sure Trev!

http://i14.photobucket.com/albums/a3...G_0872copy.jpg

bolly · 15th Apr 2007, 8:11 pm

Off topic, but may be of interest; here's the guts of my main amps(Electrohome PA-100 Mk-1's)

Partridges!!!

http://i14.photobucket.com/albums/a3...G_0715COPY.jpg

Trevor · 15th Apr 2007, 8:54 pm

the pye is a real cracker !!!
I have not heard of the electro units what is the schematic and valve line up ?
regards Trev

bolly · 15th Apr 2007, 9:41 pm

Electrohome Canada Trev. Here's a quote I found online;

"This amp uses a partridge WFB/.95 Partridge output transformer , a pair of British KT-66 output tubes, a 6SN7, a 12AU7 and a 5V4. The circuitry employed is the famous Williamson triode Class A and is rated at 15 watts RMS and a frequency response flat from 10 -100000 cps. Output impedance is 4,8,16, 32 ohms This is the last and rarest version issued - GOLD color with the rare potted power transformer not availalble on the cream and chrome versions.. It was available for less than a year in 1959. Personally, I think sound quality is better than the Marantz 2 or any of the McIntosh mono blocks."

the schematic is located on the underside of the bottom cover too!

http://i14.photobucket.com/albums/a3.../schematic.jpg

Trevor · 15th Apr 2007, 9:50 pm

Well would you believe it another Williamson clone! Yes its a classic design !
I must admit to never having heard of this version.
regards Trev

bolly · 15th Apr 2007, 9:53 pm

I'm not sure which is rarer, the PA-100 Mk-1, or the PF91.

bolly · 19th Apr 2007, 12:18 am

inside the PF91A;

http://i14.photobucket.com/albums/a3...y/IMG_0898.jpg

15th Apr 2007, 4:54 pm	#1
bolly Retired Dormant Member Join Date: Jul 2006 Location: Angus, Ontario, Canada Posts: 27	Photos; PYE PF91, PF91A and Electrohome info. figured I'd post a pic of mine as I couldn't find a pic of one here; http://i14.photobucket.com/albums/a3...G_0867copy.jpg

15th Apr 2007, 7:42 pm	#2
Trevor Octode Join Date: Aug 2006 Location: Stoke-on-Trent, Staffordshire, UK. Posts: 1,082	Re: PYE PF91, and PF91A Please show us a picture of the internal wiring Regards Trev

15th Apr 2007, 8:04 pm	#3
bolly Retired Dormant Member Join Date: Jul 2006 Location: Angus, Ontario, Canada Posts: 27	Re: PYE PF91, and PF91A sure Trev! http://i14.photobucket.com/albums/a3...G_0872copy.jpg

15th Apr 2007, 8:11 pm	#4
bolly Retired Dormant Member Join Date: Jul 2006 Location: Angus, Ontario, Canada Posts: 27	Re: PYE PF91, and PF91A Off topic, but may be of interest; here's the guts of my main amps(Electrohome PA-100 Mk-1's) Partridges!!! http://i14.photobucket.com/albums/a3...G_0715COPY.jpg Last edited by Darren-UK; 27th Sep 2007 at 10:45 pm. Reason: Textspeak.

15th Apr 2007, 8:54 pm	#5
Trevor Octode Join Date: Aug 2006 Location: Stoke-on-Trent, Staffordshire, UK. Posts: 1,082	Re: PYE PF91, and PF91A the pye is a real cracker !!! I have not heard of the electro units what is the schematic and valve line up ? regards Trev

15th Apr 2007, 9:41 pm	#6
bolly Retired Dormant Member Join Date: Jul 2006 Location: Angus, Ontario, Canada Posts: 27	Re: PYE PF91, and PF91A Electrohome Canada Trev. Here's a quote I found online; "This amp uses a partridge WFB/.95 Partridge output transformer , a pair of British KT-66 output tubes, a 6SN7, a 12AU7 and a 5V4. The circuitry employed is the famous Williamson triode Class A and is rated at 15 watts RMS and a frequency response flat from 10 -100000 cps. Output impedance is 4,8,16, 32 ohms This is the last and rarest version issued - GOLD color with the rare potted power transformer not availalble on the cream and chrome versions.. It was available for less than a year in 1959. Personally, I think sound quality is better than the Marantz 2 or any of the McIntosh mono blocks." the schematic is located on the underside of the bottom cover too! http://i14.photobucket.com/albums/a3.../schematic.jpg

15th Apr 2007, 9:50 pm	#7
Trevor Octode Join Date: Aug 2006 Location: Stoke-on-Trent, Staffordshire, UK. Posts: 1,082	Re: PYE PF91, and PF91A Well would you believe it another Williamson clone! Yes its a classic design ! I must admit to never having heard of this version. regards Trev

15th Apr 2007, 9:53 pm	#8
bolly Retired Dormant Member Join Date: Jul 2006 Location: Angus, Ontario, Canada Posts: 27	Re: PYE PF91, and PF91A I'm not sure which is rarer, the PA-100 Mk-1, or the PF91.

19th Apr 2007, 12:18 am	#9
bolly Retired Dormant Member Join Date: Jul 2006 Location: Angus, Ontario, Canada Posts: 27	Re: PYE PF91, and PF91A inside the PF91A; http://i14.photobucket.com/albums/a3...y/IMG_0898.jpg