|
Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
|
Thread Tools |
23rd Jul 2017, 5:32 pm | #1 |
Diode
Join Date: Jul 2017
Location: Portrush, County Antrim, Northern Ireland, UK.
Posts: 9
|
AR88 Trimmers
Been sorting through my "treasure" boxes, wife calls them junk !
Came across these new trimmers, at one time they were wrapped in paper labled AR88. If someone can identify them, I will donate them to a good home. Regards Alan |
24th Jul 2017, 4:22 pm | #2 |
Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,385
|
Re: AR88 Trimmers
Hi Alan, thanks for going to the trouble of joining the forum and posting, it's always good to hear of NOS component finds- by definition, they're an ever-rarer breed!
They are indeed AR88 receiver trimmer capacitors, their USP is very small chassis footprint (the front-end of this 6 band, four-gang tuning set is kinda busy), though I expect that good stability and low self-inductance also feature. Other than the AR88, they aren't seen much on this side of the Atlantic, though Marconi's 858- a three-band chassis with a fourth band shoe-horned in- features them on the highest HF band, where they had to be squeezed in on any spare postage-stamp of chassis. (I think there was a pre-war tie-up between RCA and Marconi). Possibly, they are more common in US equipment of the era. The AR88 features (at least) two different lengths and consequent capacity swings. They're pretty reliable- possibly explaining why no-one else has piped up- but the plating can flake and cause shorts occasionally. If you don't have a destination for them and no-one here calls out with an immediate need, I'd be happy for spares and to be a parts stock for anyone else on the forum with one of these fine sets, Colin |
25th Jul 2017, 12:07 am | #3 |
Diode
Join Date: Jul 2017
Location: Portrush, County Antrim, Northern Ireland, UK.
Posts: 9
|
Re: AR88 Trimmers
Hello Colin, thanks for the useful info. If you send me a PM with your address I'll stick em in a Jiffy bag for you.
Cheers. Alan |