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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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1st Jun 2021, 11:35 pm | #1 |
Pentode
Join Date: Sep 2018
Location: Maldon, Essex, UK.
Posts: 228
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B7G Quartz Crystals .
I'm hoping someone can help me to decipher the labelling on Marconi B7G-based xtals . Many years ago my data-folder "went missing", and now I cannot remember how to decode the characteristics printed on the glass envelopes (and/or the boxes they came in). My data had been gleaned from an in-house M.W.T.Co. Data Manual , and I'm hoping that someone out there still has access to a copy -- or knows where I should be looking .
Examples of inscriptions :- 50/25/129 40/20/100 200/A/S 100/B/30 300/E/30 100/F/30 Or perhaps someone who worked at Hackbridge can point me in the right direction ? Here's hoping ! Laurie. |