Growing up quick...with a 38-690xx Pics added. - Printable Version
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+--- Thread: Growing up quick...with a 38-690xx Pics added. (/showthread.php?tid=4684)
Growing up quick...with a 38-690xx Pics added. - badwaxcaps - 05-01-2012
I have been a busy bee. Honing my skills and learning as much as I can. My little Model 20 consolette just got a big brother! A 38-690 has found it's way into my very happy hands. I will be taking my time and doing this one right. All caps and lytics will be re-stuffed to preserve the original appearance under the chassis. All tubes that need replacing will be Philco branded. Proper cloth wire where needed etc etc. This set is completely original from what I can tell. Its extremely dirty and the amp chassis has some exterior rust issues but nothing terrible. It is complete and the cabinet is solid although the original finish is unfortunately too far gone to save. I'm gonna need help guy and girls. Any and all tips and tricks or advice is greatly appreciated. I know the importance of this console in Philco history and want to treat it right. Thanks!
RE: Growing up quick...with a 38-690xx - codefox1 - 05-01-2012
(05-01-2012, 12:52 PM)badwaxcaps Wrote: I have been a busy bee. Honing my skills and learning as much as I can. My little Model 20 consolette just got a big brother! A 38-690 has found it's way into my very happy hands. I will be taking my time and doing this one right. All caps and lytics will be re-stuffed to preserve the original appearance under the chassis. All tubes that need replacing will be Philco branded. Proper cloth wire where needed etc etc. This set is completely original from what I can tell. Its extremely dirty and the amp chassis has some exterior rust issues but nothing terrible. It is complete and the cabinet is solid although the original finish is unfortunately too far gone to save. I'm gonna need help guy and girls. Any and all tips and tricks or advice is greatly appreciated. I know the importance of this console in Philco history and want to treat it right. Thanks!
Wow, this is one complicated set.
You might want to get a decent schematic set from Chuck's website
http://www.philcorepairbench.com/schematics.htm
Because the one on NA is pretty blurry.
http://www.nostalgiaair.org/Resources/255/M0013255.htm
RE: Growing up quick...with a 38-690xx - badwaxcaps - 05-02-2012
Pulled all the tubes last night and found some good and some bad. Unfortunately both 6L6G's tested rather weak. I have begun taking high res digital pictures of everything for reference and started a notebook for documenting progress and such. I have seen a couple of articles on re-stuffing paper caps but was wondering if anyone has any advice on what works best.
RE: Growing up quick...with a 38-690xx - Ron Ramirez - 05-02-2012
Congratulations on your acquisition!
Just remember, do not disturb the single bakelite block in the upper chassis, part (97). That does not - repeat, does not - contain any capacitors. Instead, it contains the coils for the 10 kc audio filter! Leave it alone.
RE: Growing up quick...with a 38-690xx - badwaxcaps - 05-02-2012
Thanks for the heads up on that "cap" block Ron. I would have been sorry after chipping its insides out! Another question.. I believe the original woofer cone is in fine shape but it was recommended that I have it reconed anyway to get the best possible sound. Do I really want to do that or retain the original. I want the best possible sound reproduction but not if its going to detract from the value or originality of the set. If the speaker is shot then I can understand a recone job but what if its pristine?
RE: Growing up quick...with a 38-690xx - Ron Ramirez - 05-02-2012
No!
Unless there is a problem with the original cone...leave it alone. Believe me, the originals sound just fine, thank you.
RE: Growing up quick...with a 38-690xx - badwaxcaps - 05-02-2012
Believe me the last thing I want to do is change anything. I blast people out of the room with my 10S669 Zenith and it has it's original speaker so I will definitely retain the cone on the Philco if its in decent shape. It is composed of two different materials. Whats the significance of that design?
RE: Growing up quick...with a 38-690xx - badwaxcaps - 05-03-2012
RE: Growing up quick...with a 38-690xx Pics added. - badwaxcaps - 05-03-2012
RE: Growing up quick...with a 38-690xx Pics added. - badwaxcaps - 05-03-2012
RE: Growing up quick...with a 38-690xx Pics added. - jerryhawthorne - 05-29-2012
BWC, looks like someone tried to "reform" one of those electrolytics.
Due to holiday, your caps will mail out today. Those sockets don't look too bad. I would carefully realign the bent pins and hit the fiber board with crazy glue. If you want to go nuts, mix up a little epoxy and fill in where part of the board is missing.Jerry
RE: Growing up quick...with a 38-690xx Pics added. - codefox1 - 05-29-2012
Preserve as best your "umbilical" plugs and sockets. Wire can be replaced, but plugs and sockets, that's another story. Agree replace, restuff, whatever all the elecrolytics and paper caps at a bare minimum before even thinking about bringing set up ever so slowly with variac.
RE: Growing up quick...with a 38-690xx Pics added. - Arran - 05-30-2012
Quote: Is there any chance of obtaining replacement umbilical plugs? Somebody (not me) broke these. Probably prying them out of their sockets with a screwdriver.
There may be source for similar plugs elsewhere but I wouldn't count on finding them as they were likely proprietory to the Philco 690s and maybe only the 38-690s. Most of the two chassis sets I have seen use a 7 pin plugs and sockets to tie the cable to the chassis. I would take the plug apart and try gluing and filling the wafer back together with two part epoxy, preferably high heat epoxy without metal fill in it (do not use metal filled JB Weld) you may have to clean the phenolic material up good before you do. If it's really bad you may have to make a duplicate of the original wafer and replace it altogether.
Regards
Arran
RE: Growing up quick...with a 38-690xx Pics added. - badwaxcaps - 05-31-2012
I found some suitable material to reinforce the existing wafers. That "reformed" lytic has been straightened and restuffed. I managed to clean up the mangled shield bases and they will now accept shields correctly. Now all I have to do is locate two shields
RE: Growing up quick...with a 38-690xx Pics added. - TA Forbes - 05-31-2012
Keep up the good work!