Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Paramount => Topic started by: glynnw on October 02, 2013, 01:53:19 PM

Title: replacing 10 ohm wirewound potentiometer
Post by: glynnw on October 02, 2013, 01:53:19 PM

I think I have narrowed down a source of intermittent static in one of my 300B Paramounts to one of the 10 ohm wirewound potentiometers.  I plan to order a couple from Mouser along with a few other toys.  What wattage should I be looking for?

Title: Re: replacing 10 ohm wirewound potentiometer
Post by: Paul Birkeland on October 02, 2013, 01:59:19 PM

A 5W pot will suffice.

Just as a side note - the control will produce a little static when you're adjusting it.  If the control fails, audio output will cease all together.

-PB

Title: Re: replacing 10 ohm wirewound potentiometer
Post by: Grainger49 on October 02, 2013, 02:56:04 PM

Glynn,

If you like really dialing the hum pot down to the lowest reading try a pair of these:

http://www.mouser.com/ProductDetail/BI-Technologies/AR10L5/?qs=gQBTb7UQo2KGWe6ugobfig%3d%3d

I put a pair in my Paramours.

Title: Re: replacing 10 ohm wirewound potentiometer
Post by: glynnw on October 02, 2013, 03:07:37 PM

Holy shamoley - $66 each?  I'll think about it. But I am currently not able to hear the hum when adjusted right.

This evening I soaked the pot in question in Caig Deoxit and that seems to have worked, at least for the last hour .

Title: Re: replacing 10 ohm wirewound potentiometer
Post by: Doc B. on October 02, 2013, 03:33:29 PM

Yeah I was going to suggest exercising the pot. It hardly ever moves and sitting like that is what creates a noisy spot. twisting it a few times will often clean off the oxidation that has formed on the spot.