Neumann M49 Clone : Build Thread Puck Style (TLM49 Conversion To M49 b-c)

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Delta Sigma

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Has anyone used a Fender style 6.3V pilot light?

I am not sure where to connect the bugger...
Should I be tapping h+ on from the pot or from pin 4 on the PSU?
Careful there. It's likely that your heater transformer won't be able to provide the current unless you used an LED bulb. I've had trouble finding LED bayonets at a reasonable price. I wanted to use Fender style pilot lights just because I have them on hand with multiple jewel colours. I ended up using 120VAC because I found 120VAC LED bulbs but unfortunately, they put off a lot of heat.
 

egroys

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Apr 18, 2020
Messages
38
Careful there. It's likely that your heater transformer won't be able to provide the current unless you used an LED bulb. I've had trouble finding LED bayonets at a reasonable price. I wanted to use Fender style pilot lights just because I have them on hand with multiple jewel colours. I ended up using 120VAC because I found 120VAC LED bulbs but unfortunately, they put off a lot of heat.
Copy.
I did grab #47 LED bulbs. Am I correct to tap it from pin 4 & 7?

But I also have a regular 6.3v lamp I was told I could potentially use as a dummy load on the H+ for tuning.
Can anyone verify that?

Otherwise, I'm just about ready to start tuning it sans-capsule! Waiting on Dany's D7.

Not too shabby for a first build?
IMG_0461.JPG
 

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Purplenoise

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Sep 18, 2019
Messages
231
Copy.
I did grab #47 LED bulbs. Am I correct to tap it from pin 4 & 7?

But I also have a regular 6.3v lamp I was told I could potentially use as a dummy load on the H+ for tuning.
Can anyone verify that?

Otherwise, I'm just about ready to start tuning it sans-capsule! Waiting on Dany's D7.

Not too shabby for a first build?
View attachment 80729
Looks good man
 

garp

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Jan 15, 2012
Messages
39
I am planning to use the beesneez bv11 for this build, is the pcb suitable for this tranny or should i have to wire it manually ?
 

Purplenoise

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Sep 18, 2019
Messages
231
I am planning to use the beesneez bv11 for this build, is the pcb suitable for this tranny or should i have to wire it manually ?
Manually…which is actually easier. 4 wires on main pcb. You will use the bottom pcb for support…maybe even drill a couple of extra holes to securely strap the transformer in place. Just make sure you take under consideration the output cap size/placement
 

garp

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Jan 15, 2012
Messages
39
Thanks a lot ! Now i have to find where primary and secondary are, there are no markings on it :(
 

garp

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Jan 15, 2012
Messages
39
When i bridge some pins as indicated underneath bobin with red and blue markings and i measure the other pins i have around 1k across 2 pins and 20 ohms across the 2 others making me thinking that the first pair goes to pcb and the two others (lowest resistance) goes to the output right ? Well ... it's not very clear maybe ! when looking at the transformer pin facing me i count 6 pins in two groups of 3 upper side and 6 pins under . on the upper side i have a pencil mark joining in red pin 1 and 4 (from left to right ) and 3 / 6 in blue.
When i measure the "under" pins i have 1k between 7 and 10 and 20 ohm between 9 and 12 .
edit : according to this it seems that i can use Dan's pcb ...
 
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