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

#1

I just saw that on e-bay and since in appearance itg is exact same as 38-15 I decided to look at the sch.
So it is, give opr take, the AA5 version of 38-15.

Why woud they do both in the same year?

Just to make 38-15 cheaper?
#2

Maybe they were marketing the 38-14 to areas that still had DC power but with the ability to run on AC power as well? I don't know, just a guess. Did you notice the SW band on the 38-14 is not the same as a 38-15?

Oh, and in case you were thinking about using a 38-14 speaker in a 38-12 or 38-15, you can't...the 38-14 speaker's field coil resistance is around 3000 ohms or so (don't have a schematic in front of me so I'm guessing).

You can replace the speaker in a 38-14 with a PM speaker and safely omit the resistance as the field connects between B+ and B-. The field coil in the 38-14 is only there to excite the speaker, it does not do anything else in the radio circuitry.

--
Ron Ramirez
Ferdinand IN
#3

Ron

No I am not trying to sub the speaker; the one I have works just fine; I did not even expect it to sound so decent. After all it is not a HiFi radio, it is a small table set, but it sounds fairly good.

Yes the SW is from 2 to 8MHz and in 38-15 it is 5.5 to 19 MHz. Wonder why.




Users browsing this thread:
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM

[-]
Who's Online
There are currently no members online.

>