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

Philco Bathtub Block 3903AH ?
#1

Can't find a listing on this one.
Assume it is a .01 Block

It was changed at some point according to Philco to 3903 SG . Nothing on it either.

Bob T
#2

Yes is a 0.01 uF cap as seen below:

[Image: https://dl.dropboxusercontent.com/u/5462...903-AH.jpg]

3903-SG would be a lower melting point wax than the 3903-0SG  (the O was for higher temp wax) but should have the same configuration.  See Ron's post of Bakelite Condenser Data or Chuck's Bakelite Block Values page.
#3

(05-29-2016, 05:25 PM)klondike98 Wrote:  Yes is a 0.01 uF cap as seen below:

[Image: https://dl.dropboxusercontent.com/u/5462...903-AH.jpg]

3903-SG would be a lower melting point wax than the 3903-0SG  (the O was for higher temp wax) but should have the same configuration.  See Ron's post of Bakelite Condenser Data or Chuck's Bakelite Block Values page.

Thank you Sir. Only 6 more to go on the 16

Bob T
#4

If you have not seen it, here is a nice thread on restuffing these caps.

http://philcoradio.com/phorum/showthread.php?tid=9107
#5

(05-30-2016, 07:04 AM)klondike98 Wrote:  If you have not seen it, here is a nice thread on restuffing these caps.  

http://philcoradio.com/phorum/showthread.php?tid=9107

I use to use my Commercial Heat Gun to remove the Blocks. No More

Before Doing this Procedure check and know what your Block Contains. Blocks containing Resistors DO NOT DRILL


Now I have used the method by cutting the wires on top of Block where the inside parts are soldered. Then drilling a small size drill dead center of Tar , yes drill right on through the Caps inside.

Once you have drilled to the Bakelite, stop.  Then I use a fine thread sheet rock screw 1 1/2" long
Thread it in slowly into your drilled hole with a Phillips screwdriver. You will be amazed as you seen the entire Tar block Caps and all slowly come out.

Has not failed me yet.
Been using it on the 14 Block 16B I am working on.
Just remember to FIRST cut the wires on top where the internal parts are soldered to.

This is not my idea, I believe I saw this method over on Chuck's Site.


Bob T




Users browsing this thread:
[-]
Recent Posts
Correct model 84 Ac plug an cord type
From what I read Philco went to using brown rubber power cords in 1936, so cloth was used in the 1935 and earlier models...Arran — 11:25 PM
Correct model 84 Ac plug an cord type
Hi Bruce, I have not worked on an 84, but in general, power cords for almost any radio prior to 1938 was cloth covered...MrFixr55 — 08:34 PM
Restoring Philco 38-14
OK, well, so after staring at the sch again, I realized the problem had to be the #12/12A padder. I put a scope on the o...morzh — 08:15 PM
Correct model 84 Ac plug an cord type
Hello Bruce, I mostly use brown far as my cloth powercords go ! Here is the plug that I have used bakelite Acorn style...radiorich — 08:05 PM
Correct model 84 Ac plug an cord type
Looking for as correct as can find the right Ac plug an the correct colored cloth line. Ive seen many old photos but mos...Bruce — 04:13 PM
Restoring Philco 38-14
Rod Two Y-caps make sense if you use them from L/N to the chassis; this is only makes sense in the transformer radios...morzh — 10:11 AM
Restoring Philco 38-14
Mike, I'm curious about a specific use of he Y cap. Lately I've seen a single cap across the power transformer primary. ...RodB — 09:01 AM
Restoring Philco 38-14
hello morzh , That sounds like a plan ! Sincerely Richardradiorich — 07:45 AM
Restoring Philco 38-14
Richard, It helped some, but I still had the whining when engaging the rear power strip (I did not realize it was fro...morzh — 07:07 AM
Restoring Philco 38-14
Hello morzh, Yes , that dreaded hum in my room where i do alighment I have my cable modem and router plus desktop plus ...radiorich — 11:25 PM

[-]
Who's Online
There are currently 4393 online users. [Complete List]
» 2 Member(s) | 4391 Guest(s)
AvatarAvatar

>