Posts: 16,507
Threads: 572
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
Well, using my Variac I found that each input winding's half of my output transformer has the ratio of 30:1 to the output winding. Which makes the impedance transfer as 900. So, 6 Ohm of my speaker look like 5.4kOhm to each tube and the optimum is 3.9kOhm which is not too bad.
Plus I tried the Yamaha and it is declared 4 Ohm which makes it 3.6kOhm which is right where it needs to be and it still distorts.
So. It is not the speaker OR the output transformer.
Nice to know.
PS. The programming on the station has suddenly changed and they have that doo-wop and the distortion went way up.
Well, I turned on my 37-116....and it also kinda distorted, so at least that worsening was not due to the radio itself.
Messages In This Thread
RE: 90 restoration - by morzh - 12-29-2013, 08:28 PM
Users browsing this thread: 2 Guest(s)
|
|
Recent Posts
|
|
PT 6 chassis screws size???
|
| Have this done except for missing chassis screws.
It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Hello Stormlord,
Well done on rewinding that coil it turned fairly good for your first one.
Sincerely Richardradiorich — 09:12 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Well here it is. It ain't pretty, but hopefully it'll work.
I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM |
|
Philco 42-345 Restoration/Repair
|
| Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM |
|
Philco 42-345 Restoration/Repair
|
| Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM |
|
Testing a speaker and output transformer Trutone A2-G
|
| The equivalent of one short turn is basically the same as that of a shorted load.
If it is the primary's turn, then the ...morzh — 03:53 PM |
|
Testing a speaker and output transformer Trutone A2-G
|
| I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM |
|
Philco model 38 code 121 not receiving signal.
|
| As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Well why not! :lol:Stormlord5500 — 03:14 PM |
|
Who's Online
|
There are currently 957 online users. [Complete List]
» 2 Member(s) | 955 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
