BerndVP

Re: D-LA2A Support Thread
« Reply #1960 on: July 15, 2020, 04:56:19 PM »
NE2 from my left channel is not working.
Where do I need to look at?


dribro

Re: D-LA2A Support Thread
« Reply #1961 on: September 26, 2020, 04:36:26 AM »
Hi.
Thinking of changing the 12ax7s for 6n2p as I recently got some and they sound just great in my ride tube. A little less distortion, more bass, less plate resistance. All can be done easily with a few cuts and a dpdt switch.

Have anyone tried it?

HerbertR

Re: D-LA2A Support Thread
« Reply #1962 on: October 01, 2020, 01:42:00 AM »
Hi,
I am new at DIY and a "silent" reader since years. What a great forum, thanks!!
I also have nearly finished my Dual LA2A with Edcors WSM's and all recommanded Tubes, shielded Cabels.... All works nearly perfektly. A super silent Unit, no hum, great bypass, flat frequency response, extremly nice- shiny-smooth-expensive-warm compressing sound, from the first test. 
But only one problem: I am using the cheap chinese VU Meters, the TN73. They have a internal resistance of only 50 Ohm and I can not get them properly calibrated. Yes they are working in a correct way but I cannot calibrate them to 0dB. At max setting of the fine trimmer I can only reach about the 12 o c clock  position. Also also tried replacing the 3K6 Pre resistor with a smaller one, like a 1k and a 510R but that also does not work.
No changes. Are the cheap TN 73 meters for garbage or is there an other solution? I am thinking about ordering the 1029 VU Meters from Don's with the recommanded internal resistance of 3K9. Regards Herbert
« Last Edit: October 01, 2020, 11:11:08 AM by HerbertR »
Right over is totally wrong

Manucas

Re: D-LA2A Support Thread
« Reply #1963 on: October 15, 2020, 07:27:46 PM »
Hello.

Just begin this  D-LA2A project  :) , ordered PCM and PSU trans today from Volker.
I read also almost all pages here for this project since 2 days...
So :


I also have nearly finished my Dual LA2A with Edcors WSM's and all recommanded Tubes,

HerbertR, since I read a lot about audio transformers here, which reference of Edcor transformer did you choose ? 600:10K or 600:15K for input ? and for output ?
You say that your D-LA2A is a silent unit, which tubes ref do you use ? brand ?

Thank you really much for your help.
I'm doing now a 2020 EU BOM, when finished, I will post it here if it can help for new people doing this really nice gear.

Manu


BerndVP

Re: D-LA2A Support Thread
« Reply #1964 on: October 16, 2020, 03:18:09 AM »
I have an excel with all parts I bought for this project here in EU.
Just my tubes I bought from Tube Depot, because they where the only ones giving the option for Matched tubes, and because it's an Stereo unit, I went for that .

Manucas

Re: D-LA2A Support Thread
« Reply #1965 on: October 16, 2020, 03:17:53 PM »
I have an excel with all parts I bought for this project here in EU.
Just my tubes I bought from Tube Depot, because they where the only ones giving the option for Matched tubes, and because it's an Stereo unit, I went for that .
Ah, good informations.
Do you share your excel ?
Manu


 

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