Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

38-116 code 125 volume issues
#1

I am looking at a 38-116 for someone and it has been fully recapped and out of tolerance resistors replaced ( not by me but well done, nothing sloppy). 

Complaint is ,the volume is low and sounds like a crappy transistor radio. This thing should boom. 

I checked the bias voltage at the 6l6 tubes ( pin 5) and they have -25v on them so that is not the issue. 

Plate voltages seem a bit high, I attribute that to DMM. ( about 44 volts high on 6l6 plates and screen) . 

It also seems like there is lack of tone. every thing is tinny sounding.  output xformer check, field coil checked. 

speaker subbed to rule out speaker , still sounds like crap. 

Supposedly new tubes were put in. 

I don't know if an alignment was done.

point my in a direction of what to check next.


Messages In This Thread
38-116 code 125 volume issues - by simplex1040 - 05-28-2020, 08:59 AM
RE: 38-116 code 125 volume issues - by morzh - 05-28-2020, 10:15 AM
RE: 38-116 code 125 volume issues - by morzh - 05-30-2020, 07:33 PM
RE: 38-116 code 125 volume issues - by morzh - 05-30-2020, 09:22 PM
RE: 38-116 code 125 volume issues - by morzh - 05-30-2020, 10:10 PM
RE: 38-116 code 125 volume issues - by morzh - 05-31-2020, 12:55 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT-6 antenna connections
Thanks. I never realized that was a notch noted in the schematic as described. I’ll recheck my wiring.bridkarl — 08:13 PM
Cannot Adjust an IF Transformer’s cores
Thank you! I was quite new to the Phorum when I started this post, so I feel like it might be advantageous to publish a ...jrblasde — 08:07 PM
PT-6 antenna connections
Notice in the schematic the notch at the bottom of the antenna coil is between pins 3 & 4. Yes, pin 6 of the 7C6 is...RodB — 07:34 PM
bridkarl
I have two PT-6 chassis. On both there is a blue wire that runs from the above chassis transformer to pin 6 of 7C6. So t...bridkarl — 07:23 PM
Cannot Adjust an IF Transformer’s cores
Joseph, now you are an engineer!!RodB — 06:37 PM
PT-6 antenna connections
Hi, reading your explanation I can see the confusion. If you take it one connection at a time it should result in a desi...RodB — 06:34 PM
Cannot Adjust an IF Transformer’s cores
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original...jrblasde — 04:32 PM
PT-6 antenna connections
I seem to have lost my way on this PT-6. I see the antenna aerial transformer schematic - I’m reading pins 1 through ...bridkarl — 12:30 PM
40-150 General questions
Good thing you're a good electrician ... the pictures show a lot of rewiring in your future! Take care and BE HEALTHY!...GarySP — 11:52 AM
40-150 General questions
I think RobB has it right. It is a part number and looks like its stamped on the chassis and that wasn't something you ...klondike98 — 11:41 AM

[-]
Who's Online
There are currently 3381 online users. [Complete List]
» 4 Member(s) | 3377 Guest(s)
AvatarAvatarAvatarAvatar

>