Lundahl LL9206 problem

Pyre · 27th May 2007, 11:09 PM

Hello,

I purchased some Lundahl LL09206 transformers to step up the signal between my MM Sony cartridge and my modified Pas3. I soddered them up with what I thought was correct but can not get any sound through them. I set up the jumpers for a gain of 20. The input is fairly clear its + and -. On the output side I connected the + and - as well to a rca plug to connect into the preamp. There is a Gnd and a CT conection that I have nothing connected to, shoud I? I also have the resistor holder sodered in but have it jummered. What is it I am doing wrong. Seems pretty straight forward.

Thanks in advance.

analog_sa · 28th May 2007, 08:05 AM

Looking at the datasheet you simply need to follow termination E. So, your outputs become pin 10 and 16. What jumpers are you talking about? Have you bought a kit?

Pyre · 28th May 2007, 01:12 PM

Thanks I figured it out! Kinda a dumb mistake on my part.

I do have sort of a kit, I got the transformers with the boards to simplify installation and jummering. They have a set of posts that you sodder in and then just insert your choice of load resistor without having to resodder if you change it out. Well I made a jumper to hold them straight and forgot to remove it. This ecessianly shorted out my input. ooops I felt a bit silly when I figured it out. Wish I would have figured that out before I ripped apart my preamp for testing.

Does anyone have any reccomendations for a load resistor? My cartridge is 47 ohm I believe.

thanks

27th May 2007, 11:09 PM	#1
Pyre diyAudio Member Join Date: May 2006	Lundahl LL9206 problem Hello, I purchased some Lundahl LL09206 transformers to step up the signal between my MM Sony cartridge and my modified Pas3. I soddered them up with what I thought was correct but can not get any sound through them. I set up the jumpers for a gain of 20. The input is fairly clear its + and -. On the output side I connected the + and - as well to a rca plug to connect into the preamp. There is a Gnd and a CT conection that I have nothing connected to, shoud I? I also have the resistor holder sodered in but have it jummered. What is it I am doing wrong. Seems pretty straight forward. Thanks in advance.

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28th May 2007, 08:05 AM	#2
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	Looking at the datasheet you simply need to follow termination E. So, your outputs become pin 10 and 16. What jumpers are you talking about? Have you bought a kit?

28th May 2007, 01:12 PM	#3
Pyre diyAudio Member Join Date: May 2006	Thanks I figured it out! Kinda a dumb mistake on my part. I do have sort of a kit, I got the transformers with the boards to simplify installation and jummering. They have a set of posts that you sodder in and then just insert your choice of load resistor without having to resodder if you change it out. Well I made a jumper to hold them straight and forgot to remove it. This ecessianly shorted out my input. ooops I felt a bit silly when I figured it out. Wish I would have figured that out before I ripped apart my preamp for testing. Does anyone have any reccomendations for a load resistor? My cartridge is 47 ohm I believe. thanks

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