|
Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
|
Thread Tools |
13th May 2007, 9:52 pm | #1 |
Pentode
Join Date: Apr 2003
Location: Didcot UK
Posts: 121
|
Bush TV22 MK 11 Cap replacement
Would it be acceptable to subsitute the hum neutralizing 0.75uF non electroylic cap (Trader 1091) with a modern 1.0uF 630v poly cap.
Regards Graham |
14th May 2007, 8:37 am | #2 |
Octode
Join Date: Jan 2003
Location: Birmingham, West Midlands, UK.
Posts: 1,268
|
Re: Bush TV22 MK 11 Cap replacement
I'd be tempted to up it to 1KV, as one side of the cap is at HT (+200V) and the other (being almost connected to the mains) will, at its peak see, -370V, so thats already 570V. This doesn't leave much of a margin for any noise spikes that might occur on the mains.
Incidently, the Bush manual I have shows the cap to be 0.5uF. Also it's rating is given at 250V AC TTFN, Jon |
14th May 2007, 9:22 pm | #3 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,172
|
Re: Bush TV22 MK 11 Cap replacement
Hi Gents, one of the class X caps should be ideal in this position. It will be physically smaller and a common value is 0.68uF; 1.0uf is also available.
Ed |