In the circuit the 16Ω was labeled as F.B.II, so it should be connecting to somewhere, if you can draw the wiring of 16Ω then it will be more clear.

That means it just connects elsewhere i guess. So I can just swap the 4 ohm and 18 ohm leads and Ill be fine. I will have 16 and 8 ohm jacks correct? even with the 8 ohm being by itself

 

In the circuit the 16Ω was labeled as F.B.II, so it should be connecting to somewhere, if you can draw the wiring of 16Ω then it will be more clear.

That means it just connects elsewhere i guess. So I can just swap the 4 ohm and 18 ohm leads and Ill be fine. I will have 16 and 8 ohm jacks correct? even with the 8 ohm being by itself. I did some checking and the 16 ohm goes off and i can see it leads off into a cap and stuff.

 

I thought that the F.B could be some kind of feedback, and I found out it was connected to as feedback of the input of the tube, at the middle close to the bottom from the circuit.

 

In the circuit the 16Ω was labeled as F.B.II, so it should be connecting to somewhere, if you can draw the wiring of 16Ω then it will be more clear.

And I found out it was connected to as feedback of the input of the tube, at the middle close to the bottom from the circuit.

the chassis is labeled 16 and 8. How do I accomplish that. DId someone write the 16 and 8 in there and it originally was 4 and 8?

 

the chassis is labeled 16 and 8. How do I accomplish that. DId someone write the 16 and 8 in there and it originally was 4 and 8?

You can measure the resistances of output transformer, using gnd to be the common terminal and measure 4Ω, 8Ω, 16Ω, and trace that where is the real 16Ω connected to the jack.

 

You can measure the resistances of output transformer, using gnd to be the common terminal and measure 4Ω, 8Ω, 16Ω, and trace that where is the real 16Ω.

I have a schematic of the output transformer. I know that red is 16

 

I have a schematic of the output transformer. I know that red is 16

So you just disconnect the wire of 4Ω from the jack and connecting the wire from 16Ω to the jack that the 4Ω just disconnected.

 

So you just disconnect the wire of 4Ω from the jack and connecting the wire from 16Ω to the jack that the 4Ω just disconnected.

cool cool. and connect the 4 where the 16 was? will it impact that feedback thing ?

I should also mention that there is a wire running off the terminal the red wire connects to the 8 ohm jack.

 

cool cool. and connect the 4 where the 16 was? will it impact that feedback thing ?

I should also mention that there is a wire running off the terminal the red wire connects to the 8 ohm jack.

You just check the wiring in my posted #23.

 

You just check the wiring in my posted #23.

Okay so that wire going from the red terminal to the 8 ohm jack does not matter i can just leave it there. Just flip the 4 ohm and 16 ohm wires and I will be good. All correct?

 

Okay so that wire going from the red terminal to the 8 ohm jack does not matter i can just leave it there. Just flip the 4 ohm and 16 ohm wires and I will be good. All correct?

If you can make sure the red wire is 16Ω then you just follow the wiring in my posted #23 then it is ok, many tube amplifiers that they all have the feedback circuit, so you can try it first, when it has any affecting then you can adjust the values of feedback circuit.

 

If you can make sure the red wire is 16Ω then you just follow the wiring in my posted #23 then it is ok, many tube amplifiers that they all have the feedback circuit, so you can try it first, when it has any affecting then you can adjust the values of feedback circuit.

sorry so many questions. i am still learning. Last one. I understand your wiring i think. I keep the 16 ohm where it is, i run a wire off that and i replace that wire to go where the 4 ohm would be and just put the 4 ohm somewhere else.

 

sorry so many questions. i am still learning. Last one. I understand your wiring in the sense that i swap the two wires. I see that the 4 ohm like crosses or connects with the 16? or is that just the way you drew the line and i purely just swap them without changing anything else

Did you see the white 'X', it means that you should cut the wire between 4Ω and the jack, and connecting the 16Ω to the jack as the wiring shows in the circuit, so 4Ω and 16Ω have no any connections.

If you want to using the symbol as Ω β ← → then you just click the big 'S' on the right top of the message box, it is a toggle function.

 

thank you sir! I now understand. I keep the 16ohm wire where it is connected in the feedback thing, run a wire off of it and connect it where the 4 ohm was connected. just get rid of the 4ohm wire. thats so odd. there's already one wire coming off of where the red is connected now going to the 8 ohm connector which i assume is a part of the feedback thing so i just add another

 

Did you see the white 'X', it means that you should cut the wire between 4Ω and the jack, and connecting the 16Ω to the jack as the wiring shows in the circuit, so 4Ω and 16Ω have no any connections.

If you want to using the symbol as Ω β ← → then you just click the big 'S' on the right top of the message box, it is a toggle function.

I appreciate it. I left a message but i didnt quote you oops. But thank you very much sir. read my message above, thats what im gonna do

 

I appreciate it. I left a message but i didnt quote you oops. But thank you very much sir. read my message above, thats what im gonna do

You are welcome.
Just don't forget to feedback what you do.

 

You are welcome.
Just don't forget to feedback what you do.

I just hope i dont hurt the transformer if i make a mistake! haha. will let you know when i finish it!

You are welcome.
Just don't forget to feedback what you do.

Hey upon looking at the schematic again. doesn't that connection i circled mean it should be going to a pot?

 

It has been modified from its original but I want to return it to stock. Someone who is good with schematics please do tell. I am trying to wire the output transformer back to how it is supposed to be. What wires need to go where. I have one output jack with 2 terminals and one with 3. I am assuming that com goes on the 3. Note that red goes to a feedback thing and I know that the red one is fine. I just need to know where the black, grey, and brown wires go. also, right now the com is going to the output jack and it says it needs to go to ground. For the other three wires to go to the jack that will need to go elsewhere, where? Thanks!

 

I just hope i dont hurt the transformer if i make a mistake! haha. will let you know when i finish it!

Hey upon looking at the schematic again. doesn't that connection i circled mean it should be going to a pot?

It is not a pot, it is a contact of the jack, that is also one kind of switch and it was made by metal and the acting like as metal spring, you can treat it as the jack of earphone, relay, relay is used the coil to generate the magnet to absorb and hold the metal, and this kind of jack was used the plug to push the metal and the metal is also the contact.

 

Insert the speaker jacks.......and observe the switching action.