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

Update on 38-5 restoration, Almost ready for cabinet!
#3

I think if it where mine and I was going to use the table top cabinet I would use a PM spkr and do away with FC. The main problem is that for the most part the K style spkrs are used lower tube count sets (table top set) There area few exceptions but the FC in a ten tube set is going to be able more current that a 6tuber with the same resistance. More current means more magnetism, conversely you could use a ten tube set's spkr in replacement on a six tube set but there may not be enough current flow to generate the full amount of magnetism to run the spkr properly.

The console's opt is usable with a PM spkr although not a perfect match. Most of the older Philco VC impedance is around 1 3/4 ohms, modern spkr are 3-4 ohms. Not too much to loose any sleep over.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry


Messages In This Thread
RE: Question on philco 38-5 restoration - by Radioroslyn - 10-29-2016, 12:05 PM



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 1039 online users. [Complete List]
» 4 Member(s) | 1035 Guest(s)
AvatarAvatarAvatarAvatar

>