03-24-2013, 04:16 PM
03-24-2013, 04:16 PM
03-24-2013, 06:01 PM
I've noticed that a lot of older Philco speakers had a sort of flat grey colour to them, I think it may have been some sort of plating or pickled metal treatment. Most speakers generally seem to have had some sort of cadmium or zinc plating, the Philco K series 8'' included, although some like the Stromberg Carlson ones were painted. Seeing stuff in photos is often different then in real life, the grey paint didn't look that bad to me other then being too glossy, but maybe it was too light in colour.
Regards
Arran
Regards
Arran
03-29-2013, 05:04 PM
04-02-2013, 09:13 PM
04-02-2013, 09:34 PM
Bob, that combination of black and stainless steel gave a stunning result. How did you ever come up with that combo. Looks fantastic, can hardly wait for the recone process.
Jerry
Jerry
04-05-2013, 08:53 PM
I learned from another restorer that it's best to use a coat of black paint before silver metallic. That was my inspiration to try dabbing metallic paint with a brush over black paint.
Now back to the cones. The holes have been patched in the old originals, but they are still rather brittle. So I fit them in place and applied a diluted solution of Aleene's Tacky Glue and let them dry.
Note the clothespins would have crushed the ribbed surround so I used little brass tubing shims.
They are much more resilient now and ready to be installed. Perhaps I should dab a little back paint over the white patches too.
Now back to the cones. The holes have been patched in the old originals, but they are still rather brittle. So I fit them in place and applied a diluted solution of Aleene's Tacky Glue and let them dry.
Note the clothespins would have crushed the ribbed surround so I used little brass tubing shims.
They are much more resilient now and ready to be installed. Perhaps I should dab a little back paint over the white patches too.
10-02-2013, 09:59 PM
Now you're probably wondering what about the pair of speakers I was restoring ? Well, the cones and voice coils are fine, but the rust has been slowly creeping back and the paint is blistering a bit. I think because the Bondo glazing compound is out gassing. Finally, the output transformer is falling apart.
So when I saw these on ebay from a 15X, I had to bid on them. I won and they just showed up today
Assuming these work out, I'll keep the original pairs as backup.
No chance of these cones getting torn in during shipping. I wish all sellers took as much care.
I'm curious about this plug. I think the 15X used an identical chassis to the 15DX but my old speakers were hardwired to the chassis
So when I saw these on ebay from a 15X, I had to bid on them. I won and they just showed up today
Assuming these work out, I'll keep the original pairs as backup.
No chance of these cones getting torn in during shipping. I wish all sellers took as much care.
I'm curious about this plug. I think the 15X used an identical chassis to the 15DX but my old speakers were hardwired to the chassis
10-03-2013, 07:09 AM
If your speakers are hardwired, your model 15 is an early production model. Philco added the odd 5-pin plug later in production, when it became obvious that servicing one of these monsters with hardwired speakers would be rather difficult.
I've owned a couple 15X sets; the first had hardwired speakers, the one I have now has the 5-pin plug.
I've owned a couple 15X sets; the first had hardwired speakers, the one I have now has the 5-pin plug.
10-03-2013, 11:09 AM
10-10-2013, 03:51 PM
I just did some testing and found that one side of the output transformer primary is open
10-16-2013, 01:57 PM
If it comes down to it, do you guys think this Hammond 15 W universal PP transformer would be suitable ? This chassis uses push pull 42s for the output. I'm not sure of the speaker impedance.
http://www.tubesandmore.com/products/P-T125E
http://www.tubesandmore.com/products/P-T125E
10-16-2013, 08:15 PM
Short answer: Yes. The output impedance will be low, around 1.2 ohms (I think), so try the tap that gives the lowest output impedance first.
Edit: Just looked it up. The original had a 16,000 ohm impedance primary to a 1.25 ohm output load, so I was almost right.
Edit: Just looked it up. The original had a 16,000 ohm impedance primary to a 1.25 ohm output load, so I was almost right.
10-16-2013, 09:54 PM
Excellent. First I'll try to salvage one of the originals, but if I fail it's good to have a backup plan
06-16-2014, 06:34 PM
06-17-2014, 11:25 AM
Can't wait to see this one Finished, Bob. Glad you're back to working on it.