- July 28, 2018 at 6:35 pm #10318
I was recently working on a Rogers B7/30 battery set (Chassis Type 22) for a friend. The set was populated with a mix of Auto-Lite ‘Tiger’ brand and Micamold (Bakelite body) capacitors. The Micamold ones were the ‘domino’ type, so their values could be easily determined using the colour code. However, the Auto-Lite ‘Tiger’s had only part number identifiers and the schematic I have is a very poor scan with many of the values difficult to determine. Not having any information on the part numbers for this brand to hand, I was tempted to use ‘generic’ values, eg. 0.05uF for screen bypass, and using the physical size of the capacitor as a guide. However, a search on the Antique Radio Forum (ARF) turned up this posting (under a rather obscure title of ‘Purpose of 10mfd dry electrolytic positive ground’) that identified several Auto-Lite part numbers as follows, though the source of the information was not disclosed:
Part No. Capacitance Voltage
38102 = 0.05uF 200vw
38105 = 0.05uF 400vw
38106 = 0.1uF 200vw
38107 = 0.25uF 400vw
38108 = 0.5uF 400vw
38121 = 0.1uF 400vw
38128 = 0.003uF 200vw
38133 = 0.005uF 200vw
13533 = 10uF ?vw
- This topic was modified 2 weeks, 5 days ago by Gerry O'Hara.
Attachments:July 28, 2018 at 6:48 pm #10321
If anyone has a more comprehensive list of the value corresponding to the Auto-Lite ‘Tiger’ capacitor part numbers it would be great if you could post it here and/or a link to a document with them in. Thanks!July 29, 2018 at 5:53 pm #10325
John GreenlandCVRS Member
Have a look here. http://pacifictv.ca/schematics/rogersb7-30data.pdf
The chart is there for some of the values. It appears that the numbers are Roger actual part numbers.
TTFNAugust 2, 2018 at 1:32 pm #10336
Many thanks John – much better copy of the schematic.
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