Electronics > Projects, Designs, and Technical Stuff
It looks for me as stupid schematic (Oldtimers welcome!)
schmitt trigger:
floobydust:
Thanks for this particular RCA schematic you attached.
I have the exact same RCA receiving valve manual RC-29, but in Spanish. Published by Editorial Arbo from Argentina, @ 1974.
Although the very first page indicates that this is an authorized version from RCA Corporation, Electronic Components, Harrison NJ, the book has a serious omission:
The project 29-22 Series-type stabilized voltage supply (Fuente de Alimentacion estabilizada tipo serie) does not include a schematic! Seriously!
It is the only topic in the whole book which is missing an attached image or schematic.
Other than that, the Spanish description and parts list is wholly accurate, word by word.
Back in my tube experimenting days of the mid 1970s, I remember reading the circuit description and being enticed to build it, but then becoming frustrated that without a schematic I wouldn't be able to do so.
Roughly 45 years later, I finally see what the schematic looks like.
Thanks!
Yansi:
Why R1 in the anodes? That should have been in the cathodes... :o
... to provide negative feedback for dividing current evenly between the twoobs.
001:
--- Quote from: schmitt trigger on October 08, 2019, 01:17:38 am ---
Roughly 45 years later, I finally see what the schematic looks like.
--- End quote ---
Can You tell what minimal and maximal output voltages achieved with this strange potentiometer R9?
T3sl4co1l:
Well, not less than 80V, where it will oscillate. But that would require a larger value than is shown. Adjustable range looks to be around 180V to Vin (unregulated).
Tim
001:
--- Quote from: T3sl4co1l on October 10, 2019, 11:48:17 pm --- Adjustable range looks to be around 180V to Vin (unregulated).
--- End quote ---
Thanx a lot!
But is it real Vin (unregulated)? It means zero voltage drop at pass tube, izn`t it?
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