UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Tractorfan · 20th Dec 2010, 8:29 pm

Hi again,
This has been a very interesting learning curve for me as I knew nothing at all about re-capping before I joined this forum, and now I'm learning a lot about FM discriminators. It's great! Plus my radiogram is working better for its age than it has for years

. Even though it's maybe not 100% yet.
I replaced the elec cap in the discriminator for a bigger one. It's now 10uF (I fitted a 2.2uF when I took out that 0.1uF) and things are getting better all the time! I also tried a different EB91 which only made a slight improvement. Still, I'm very pleased with progress so far.
Al: I'm sure you are right, but I haven't a clue myself. As I said, it's positively ancient with B7 metallised valves and a dial marked in "cycles per second", I very much doubt it'll get anywhere 10.7MHz

.
Cheers & Merry Christmas

20th Dec 2010, 8:29 pm	#11
Tractorfan Dekatron Join Date: Mar 2008 Location: St. Frajou, l'Isle en Dodon, Haute Garonne, France.(Previously: Ellesmere Port, Cheshire, UK.) Posts: 3,183	Re: "Fuzzy" FM Hi again, This has been a very interesting learning curve for me as I knew nothing at all about re-capping before I joined this forum, and now I'm learning a lot about FM discriminators. It's great! Plus my radiogram is working better for its age than it has for years . Even though it's maybe not 100% yet. I replaced the elec cap in the discriminator for a bigger one. It's now 10uF (I fitted a 2.2uF when I took out that 0.1uF) and things are getting better all the time! I also tried a different EB91 which only made a slight improvement. Still, I'm very pleased with progress so far. Al: I'm sure you are right, but I haven't a clue myself. As I said, it's positively ancient with B7 metallised valves and a dial marked in "cycles per second", I very much doubt it'll get anywhere 10.7MHz . Cheers & Merry Christmas __________________ "Hello?, Yes, I'm on the train, I might lose the signal soon as we're just going into a tunn..."