Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Philco Bakelite block condensers?
#1

Sorry for the dumb question, but I've always wondered. Why did Philco use the Bakelite blocks in their designs? It seems like it would have cost more than the components themselves.

Thanks, Pat
#2

It was, I believe, a combination of factors. One was sealing the components in high temperature wax which was thought at the time to make the condensers (and the occasional resistor) inside impervious to moisture. Time has proven this to have been false, as the old paper capacitors go bad whether they are sealed in a Bakelite block or in a cardboard tube. Another, the bakelite blocks provided convenient tie points for wiring. Another thought - early on (mid 1930), their use helped keep their circuit designs somewhat of a mystery unless one had access to schematic diagrams. Of course, thanks largely to the work of John F. Rider who published his Perpetual Trouble Shooting Manuals, schematic diagrams for many radios became more widely available to the servicemen of the day around 1931.

Oh, and that is not a dumb question. The only dumb question is the one which goes unasked. Icon_smile

--
Ron Ramirez
Ferdinand IN




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
American Bosch Model 802 auto radio
Hello again;   I found a model 838 car radio on Nostalgia Air under United American Bosch, http://www.nostalgiaair.org/...Arran — 09:32 PM
New Philco Repair Bench
Morzh is correct. The repair bench on our website is an archived image of chuck’s original site. He no longer provides s...klondike98 — 05:32 PM
Made mistake & did not label connection
Excellent information. It is all starting to come together now and your explanation really helped since I noticed that ...georgetownjohn — 04:39 PM
Made mistake & did not label connection
Hi John, I don't have this radio, but I can supply some info: Based on your pic, pins 7,8 and 1 are used together, go...MrFixr55 — 02:02 PM
New Philco Repair Bench
As far as I know, the Repairbench does not work, and has not been working in a while. Chuck (we had that campaign looki...morzh — 01:33 PM
Radio city products 664 schematic request
Need a schematic or manual for the 664. The 663 may be similar.daveone23 — 12:38 PM
New Philco Repair Bench
Thanks Gary.dconant — 12:16 PM
New Philco Repair Bench
I tried accessing the site through our library and got the same response. It's reported to our tech gurus. GaryGarySP — 11:50 AM
New Philco Repair Bench
I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM
Made mistake & did not label connection
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires. Why'n't you...morzh — 09:49 PM

[-]
Who's Online
There are currently no members online.

>