Info on Mechanical exchanges - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Sean Williams · 12th Dec 2006, 10:11 pm

Doh! - I knew I had a set somewhere! - No need to worry Sam, I will get another set....

Mutter, mutter, grumble, grumble off to a dark room........

Chris_C · 24th Jan 2007, 5:55 pm

Posts on users stories re Mechanical exchanges moved to:
https://www.vintage-radio.net/forum/...ad.php?t=14324

OldGuyGPO · 14th Jan 2008, 3:37 am

Sean, I used to maintain pre 2000 and 2000 type 2 motion selectors when electricity used to come in pounds, shillings and pence (spelled with a "d").

I can remember some stuff, like what the relays used to do, A, B, CD, HA, HB, etc. And why the CD relay was slugged. And why the A relay had an Istmas Armature.

I used to maintain standard uni-selectors too, but they are baby stuff.

For two motion selectors you will need 50 volts and loads of it. And watch out for the back emf the coils give out on disconnect.

I might remember some stuff you may need. I studied Atkins in 1969.

OldGuyGPO.

12th Dec 2006, 10:11 pm	#21
Sean Williams Dekatron Join Date: Feb 2005 Location: St.Ippolyts, Hitchin, Hertfordshire QRA IO91UW Posts: 3,517	Re: Info on Mechanical exchanges Doh! - I knew I had a set somewhere! - No need to worry Sam, I will get another set.... Mutter, mutter, grumble, grumble off to a dark room........ __________________ Engineers make things work and have spare bits when finished

24th Jan 2007, 5:55 pm	#22
Chris_C Hexode Join Date: Jan 2003 Location: Darlington (DL3) North East U.K. Posts: 394	Re: Info on Mechanical exchanges Posts on users stories re Mechanical exchanges moved to: https://www.vintage-radio.net/forum/...ad.php?t=14324 __________________ Chris C G8TJR

14th Jan 2008, 3:37 am	#23
OldGuyGPO Retired Dormant Member Join Date: Jan 2008 Location: Ringwood Posts: 5	Re: Info on Mechanical exchanges Sean, I used to maintain pre 2000 and 2000 type 2 motion selectors when electricity used to come in pounds, shillings and pence (spelled with a "d"). I can remember some stuff, like what the relays used to do, A, B, CD, HA, HB, etc. And why the CD relay was slugged. And why the A relay had an Istmas Armature. I used to maintain standard uni-selectors too, but they are baby stuff. For two motion selectors you will need 50 volts and loads of it. And watch out for the back emf the coils give out on disconnect. I might remember some stuff you may need. I studied Atkins in 1969. OldGuyGPO.