Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

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, 06:25 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, 08:04 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
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM

[-]
Who's Online
There are currently 1874 online users. [Complete List]
» 1 Member(s) | 1873 Guest(s)
Avatar

>