Claymore Transistor Intercom - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Simon Gittins · 11th Nov 2020, 10:34 pm

The electrolytic capacitors also have + and - marked and need to be connected the same way around as the originals.

Sparks · 12th Nov 2020, 8:17 am

Thankyou Mark and Simon. I'll need to buy some capacitors first. Fortunately I already have a multimeter.

Sparks · 12th Nov 2020, 10:00 am

I've looked inside the units. These are the capacitors I've found:

Slave - 30 mfd 10v grey

Master - 30 mfd 10v grey
30 mfd 6v grey
5 mfd 6wv black
10 mfd 10v black
30 mfd 10wv black

I haven't come across 'wv' before.

TonyDuell · 12th Nov 2020, 10:04 am

I think 'wv' just means 'working voltage'

The 10uF (mfd, microfarad) one you can get easily. I'd use 4.7uF for the 5uF one and 33uF to replace the 30uF capacitors. These values are not very critical

You can use capacitors rated for a higher voltage than the ones already there, but some people say it's a bad idea to use ones rated at far too high a voltage. Stick with ones rated at 100V or less and you'll be fine.

Sparks · 12th Nov 2020, 10:28 am

Much obliged, Tony. I'll see what I can find.

11th Nov 2020, 10:34 pm	#21
Simon Gittins Heptode Join Date: Jan 2006 Location: Cornwall, UK. Posts: 505	Re: Claymore Transistor Intercom The electrolytic capacitors also have + and - marked and need to be connected the same way around as the originals.

12th Nov 2020, 8:17 am	#22
Sparks Heptode Join Date: Oct 2006 Location: Leeds, West Yorkshire, UK. Posts: 596	Re: Claymore Transistor Intercom Thankyou Mark and Simon. I'll need to buy some capacitors first. Fortunately I already have a multimeter.

12th Nov 2020, 10:00 am	#23
Sparks Heptode Join Date: Oct 2006 Location: Leeds, West Yorkshire, UK. Posts: 596	Re: Claymore Transistor Intercom I've looked inside the units. These are the capacitors I've found: Slave - 30 mfd 10v grey Master - 30 mfd 10v grey 30 mfd 6v grey 5 mfd 6wv black 10 mfd 10v black 30 mfd 10wv black I haven't come across 'wv' before.

12th Nov 2020, 10:04 am	#24
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: Claymore Transistor Intercom I think 'wv' just means 'working voltage' The 10uF (mfd, microfarad) one you can get easily. I'd use 4.7uF for the 5uF one and 33uF to replace the 30uF capacitors. These values are not very critical You can use capacitors rated for a higher voltage than the ones already there, but some people say it's a bad idea to use ones rated at far too high a voltage. Stick with ones rated at 100V or less and you'll be fine.

12th Nov 2020, 10:28 am	#25
Sparks Heptode Join Date: Oct 2006 Location: Leeds, West Yorkshire, UK. Posts: 596	Re: Claymore Transistor Intercom Much obliged, Tony. I'll see what I can find.