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

Thread Closed
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, 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: 1 Guest(s)
[-]
Recent Posts
Rogers Majestic R-646
Vlad; I was just reminded of something else, I'm not sure why but many Rogers built sets do seem to have open primari...Arran — 04:40 PM
Rogers Majestic R-646
Thanks RpdB I don't think there's much difference with interstage transformers of different models other than dimersion...Vlad95 — 03:27 PM
Rogers Majestic R-646
Vlad; I looks like your set has the same problem that mine did, both a bad output transformer, and a bad audio inters...Arran — 03:21 PM
Rogers Majestic R-646
Ouch! Not often the secondary takes a hit. Wish there was a better solution. I have a good interstage transformer but it...RodB — 02:59 PM
Rogers Majestic R-646
By the way, the bypass you suggested is a rare solution in some circuits. For example, this schematics solution is used...Vlad95 — 01:43 PM
Rogers Majestic R-646
No, you are wrong, because you did not know the details. Unfortunately, only ONE winding out of six is intact in both t...Vlad95 — 01:14 PM
Rogers Majestic R-646
The output 45s are still in push-pull because the transformer secondary winding is still in the grid circuit providing o...RodB — 11:52 AM
Rogers Majestic R-646
Thanks RodB for the help. But this is not a real solution to this situation, not even a temporary one. Because the firs...Vlad95 — 11:34 AM
Philco Model 16 wiring question
I was going to check the voltages as you suggested and hooked it up to my dim bulb. It appears I have a short. The bul...bobclausen — 10:34 AM
Rogers Majestic R-646
You can bypass the interstage transformer by disconnecting the primary, connect a load resistor of about 10k - 20k to th...RodB — 09:40 AM

[-]
Who's Online
There are currently 1001 online users. [Complete List]
» 3 Member(s) | 998 Guest(s)
AvatarAvatarAvatar

>