first time build TSE45 need help

[mkane77g]

ditch the volume pot and c what happens

 

[first_1st]

Are all the voltage and bias readings where they should be during the checkout?

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[first_1st]

ditch the volume pot and c what happens

Now I bypass Volume pot to RCA direct. Can you tell me how to measure C?

 

[mkane77g]

C as in see. sorry. Do you have volume now?

 

[denny3249]

C=See... Your readouts are where they should be so hooking up the speakers that you intend to use with the amp is safe to do. I'm going to guess the speakers in the pictures are for testing only. This amp with type 45 tubes only produces approx. 1.5 to 2 watts with the volume turned up, so you need fairly efficient speakers to enjoy the music... dB in the 90's or higher is a good idea. I use Klipsch and JBL speakers... both at 94dB and have no problem getting "bother the neighbors" volume, especially with the 15 inch JBL's.

 

[first_1st]

C=See... Your readouts are where they should be so hooking up the speakers that you intend to use with the amp is safe to do. I'm going to guess the speakers in the pictures are for testing only. This amp with type 45 tubes only produces approx. 1.5 to 2 watts with the volume turned up, so you need fairly efficient speakers to enjoy the music... dB in the 90's or higher is a good idea. I use Klipsch and JBL speakers... both at 94dB and have no problem getting "bother the neighbors" volume, especially with the 15 inch JBL's.

for bias i use car speaker for real test i use with beyma cp800ti In horn 110 db it still very low power

 

[mkane77g]

Output transformers wired correctly.

 

[mkane77g]

cold solder joint on the inputs. Should be a simple fix from here

 

[first_1st]

Output transformers wired correctly.

Yes Blue cable on plate of tube

 

[first_1st]

cold solder joint on the inputs. Should be a simple fix from here

First time Think I already ground RCA input on chassis to avoid Ground loop I not ground end of shield cable

Now I ground like you said. Problem solve !

Thank you Very much

 

[first_1st]

When the amp is louder I found another problem the left channel louder than Right channel more than 2x

I already check volume pot resistance are very equal from two side.

 

[Evenharmonics]

Check the AC voltage with voltmeter at each output terminal while playing sine-wave tone and see how they differ.

 

[first_1st]

now when i put osiloscope end of couping capacitor gain are not same between two couping capacitor gain15x and 30x

the tube are ok i switch between two side it same result.

 

[first_1st]

Now I founf the problem is Mundorf Silver gold capacitor both are wrong value(25pf,45pf) I don't know what happen when I Change to the new capacitor it work now. Thank you every one.


With is TSU what value of the Volume pot will work ok with this amp 50K,100K,250K?

 

[mkane77g]

fantastic

 

[denny3249]

With is TSU what value of the Volume pot will work ok with this amp 50K,100K,250K?

I use ALPS 100K with most of my projects... If you go with an ALPS, buy from a reputable dealer...there are a lot of questionable pots on the bay. I buy mine from Mouser.