Kolster "B" Socket Power Unit

Federal Telegraph Co.; Newark NJ (before San Francisco)

Data
Forum
Pictures
Collections

  • Year
  • 1927
  • Category
  • Power supply/conditioner or battery or charger 
  • Radiomuseum.org ID
  • 195464
    • alternative name: Kolster Radio Corporation

 Technical Specifications

  • Number of Tubes
  • 1
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Kolster "B" Socket Power Unit - Federal Telegraph Co.; Newark
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 3.75 x 7 x 9.5 inch / 95 x 178 x 241 mm
  • Author
  • Model page created by Mark Skala. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Kolster "B" Socket Power Unit is part of the collections of the following members.

 Forum

Forum contributions about this model: Federal Telegraph Co: Kolster "B" Socket Power Unit

Threads: 1 | Posts: 5

A while back I was working on this old power supply and had corresponded with someone in Radiomuseum on this. I am back on this project and hope to get some added help. Here is what I know:

The transformer in this unit is putting out 250 (+/-) volts DC. I tested the voltages at the taps and they are all wrong, indicating a bad resistor I think. The 135 VDC tap reads a full 250, the 90 vdc tap also reads 250. The 67 and 22 vdc taps all read low.

I substituted the big Mershon liguid filled cap with three smaller electrolytics rated for 600 vdc. (10uf as indicated on the original).

The resistor resistor reads open all the way up, except there is resistance between the top two (135 & 90) but not to the common below. The posibility of finding a replacement resistor is probably nill. Likewise any schematics.

My goal was to make this a functioning unit again, not just a display.

Can anyone offer some assistance?

Thanks in advance,

Mark

 

 

Mark Skala, 05.Oct.11

Weitere Posts (5) zu diesem Thema.