Philco 70 cathedral knobs
Posts: 330
Threads: 40
Joined: May 2015
City: Sanger, CA
State, Province, Country: California
I just bought a super nice original finish Philco Model 70 cathedral. It even has the copper Mershon capacitors in place. There are two small knobs, a large flowered knob and a later 30's Philco knob on it now. Should it have three small fancy knobs and one large one or what?
Steve
(This post was last modified: 03-29-2017, 05:41 PM by SteveG.)
Posts: 4,109
Threads: 311
Joined: Nov 2013
City: Kings Park NY
Haha, This question come up a lot...
Unfortunately I dont remember, lol..
I have all the types if you need any...
Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
It depends on which version of the 70 you have - early or late.
Early versions (below S/N B22000) use three of the small rosette knobs on the three lower shafts, and a medium rosette on the tuning shaft.
Late versions (above S/N B22000, these use 35/51 tubes and do not have a separate 27 oscillator tube) use a large rosette on the tuning shaft, two medium rosettes on the tone and volume shafts, and a small rosette on the off-on switch shaft.
This has been argued about, disagreed upon, etc. many times over the years, but Philco's own documentation bears this out. So, I go along with the Philco documentation.
"You don't have to agree with me - you have every right to be wrong if you want to be." - Rev. Lowell Mason, RIP
--
Ron Ramirez
Ferdinand IN
Posts: 330
Threads: 40
Joined: May 2015
City: Sanger, CA
State, Province, Country: California
Kirk and Ron,
Thanks for the input. I have to wait now, until it arrives, to determine the serial number. Will advise, upon its arrival next week. I'm hoping to find a nicer tube shield with a full decal and it looks like the dial face may be faded a bit, so I'll look for an original to replace that too.
Steve
(This post was last modified: 03-29-2017, 11:43 PM by SteveG.)
Posts: 15,444
Threads: 539
Joined: Oct 2011
City: Jackson, NJ
And a good thing is, I guess, that from the outside there is no appreciable difference between the old and new versions (it's an arcane knowledge, if there is anything to know; I know there is a difference in the way the grill latticework is routed along the edges but I am not even sure this is the difference in question) so either set of knobs, early or late, will look right.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
It may look right to those who do not know, but that doesn't make it right. I want my early 70 to look the way it did when it left the factory, so it has three small rosette knobs plus a medium rosette for tuning.
One could use 1935 Philco hex knobs, or even RCA or Brand Z knobs. It wouldn't look right but it would be functional. (Actually you couldn't use RCA knobs as many of those required a half-flatted shaft and the Philco shafts were 1/4 flatted.)
--
Ron Ramirez
Ferdinand IN
Posts: 330
Threads: 40
Joined: May 2015
City: Sanger, CA
State, Province, Country: California
I appreciate what Mike says, but I'm kinda particular about my stuff too. If I can make it right, that's where I'm headed...
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
Good for you!
--
Ron Ramirez
Ferdinand IN
Posts: 330
Threads: 40
Joined: May 2015
City: Sanger, CA
State, Province, Country: California
Well, I got the radio yesterday and the serial # is 652376 so it's a late version. How late is this?
Posts: 86
Threads: 15
Joined: Sep 2012
City: Paducah, KY
I am working on a "later" version and the Switch has a tiny knob , volume has rosette and tone has rosette and tuning has a bigger rosette knob.
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
(04-05-2017, 07:33 PM)SteveG Wrote: ...and the serial # is 652376 so it's a late version.
Actually, it is still an early version.
Late versions have serial numbers above S/N B22000.
Let's examine that in detail.
When Philco's serial numbers made it to 999999, instead of starting over or adding a seventh digit, the next number became A00000. When they got to A99999 the next number was B00000.
So...according to Philco's documentation...any 70 chassis with a S/N above B22000 was supposed to be a late version. S/Ns below B22000 were early versions.
--
Ron Ramirez
Ferdinand IN
Posts: 330
Threads: 40
Joined: May 2015
City: Sanger, CA
State, Province, Country: California
Ron,
Thanks for that clarification. Luckily, I have all the knobs for that version!
Posts: 86
Threads: 15
Joined: Sep 2012
City: Paducah, KY
This thing sounds good once I "fixed" what someone else fixed.....
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
Don't they always...
--
Ron Ramirez
Ferdinand IN
Posts: 599
Threads: 24
Joined: Jan 2014
City: Edmonton AB CA
(04-06-2017, 09:43 PM)simplex1040 Wrote: This thing sounds good once I "fixed" what someone else fixed.....
Never a truer statement, I can't believe how bad some repair work from the past was and how rare I see examples of good work.
Gregb
Users browsing this thread: 1 Guest(s)
|
Recent Posts
|
GE Model P-975F
|
There are 2 of these on ePay and several pics on Radiomuseum. Although the front looks like a very popular Hong Kong ra...MrFixr55 — 09:26 AM |
Rare zenith 6s137 restore
|
Hi Fred,
I get things to work, but what you, Russ, RadioSvit and many others on the Phorum do with cabinet and chassis...MrFixr55 — 09:02 AM |
PT-6 antenna connections
|
Hi Bridcarl
+1 on the others. Pin 6 of the 7C6 is the AVC Diode so it is appropriate that that pin 4 of the coil con...MrFixr55 — 07:30 AM |
462ron
|
Joseph, this is beyond awesome. A lot of thought and engineering went into this and you hit a home run! Now I must save ...462ron — 07:27 AM |
Cannot Adjust an IF Transformer’s cores
|
Outstanding work indeed. I wish I could come up with solutions like this.slford310 — 11:16 PM |
Cannot Adjust an IF Transformer’s cores
|
The abilities of our 'Phorum Pholks" never ceases to amaze me! Fantastic fabrication, Joseph! I'm waiting now for...GarySP — 08:27 PM |
PT-6 antenna connections
|
Thanks. I never realized that was a notch noted in the schematic as described. I’ll recheck my wiring.bridkarl — 08:13 PM |
Cannot Adjust an IF Transformer’s cores
|
Thank you! I was quite new to the Phorum when I started this post, so I feel like it might be advantageous to publish a ...jrblasde — 08:07 PM |
PT-6 antenna connections
|
Notice in the schematic the notch at the bottom of the antenna coil is between pins 3 & 4.
Yes, pin 6 of the 7C6 is...RodB — 07:34 PM |
bridkarl
|
I have two PT-6 chassis. On both there is a blue wire that runs from the above chassis transformer to pin 6 of 7C6. So t...bridkarl — 07:23 PM |
Who's Online
|
There are currently 4149 online users. [Complete List] » 2 Member(s) | 4147 Guest(s)
|
|
|
![>](https://philcoradio.com/phorum/images/bootbb/asb/right_arrow.png)
|