Replacing trimmers?

8 replies

When recapping 70's Beomasters, is it recommended to replace the trimmer potentiometers at the same time?

Depends on the type originally fitted, but in most cases yes.

Martin

Dillen wrote:

Depends on the type originally fitted, but in most cases yes.

Martin

 

OK, are there recommended types for this, or should ordinary open carbon trimmers (like in original) be used? 

I have been using Piher and Bourns, closed types,

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050

Søren Mexico wrote:

I have been using Piher and Bourns, closed types.

I agree, Pihers (cermet or carbon) are okay and cheap. There are better alternatives, but they are usually unnecessarily expensive.

I have always wondered why B&O didn't use encapsulated trimmers in the first place!

Replace them anyway, but if you can avoid touching the tuner ones, leave them well alone.

 

 

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050

OK, I looked up the Piher closed cermet trimmers. These are available with 5 x 10 mm pinout at very decent prices. That looks to me like the best choice. In the drawer I only have cermets with 5 x 2.5 mm pinout, so I'll have to order these.

Agent00soul wrote:

OK, I looked up the Piher closed cermet trimmers. These are available with 5 x 10 mm pinout at very decent prices. That looks to me like the best choice. In the drawer I only have cermets with 5 x 2.5 mm pinout, so I'll have to order these.

You can also order by Martin, also closed and good ones😂, and while you are at it why not the caps too. easier and fast delivery, just not to Mexico

 

Location: Mexico city

Retired
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050
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