Dual La2a - [silent:arts] version
Hi,
just opened my 2LA2 again. Each time I turned the gain pot of the left channel to max I had a strange "uiiiiiiiiiihg" noise. I swapped tubes, changed tubes, checked the wiring, nothing changed.
Then I changed the position of the output tx (Edcors) because I found it quite close to the output XLR, although the solder lugs were isolatted with heat shrinks. Guess what, the oscillation sound has gone. RMAA specs were much better after that change. So be aware, where you put the output tx.
regards
Bernd
just opened my 2LA2 again. Each time I turned the gain pot of the left channel to max I had a strange "uiiiiiiiiiihg" noise. I swapped tubes, changed tubes, checked the wiring, nothing changed.
Then I changed the position of the output tx (Edcors) because I found it quite close to the output XLR, although the solder lugs were isolatted with heat shrinks. Guess what, the oscillation sound has gone. RMAA specs were much better after that change. So be aware, where you put the output tx.
regards
Bernd
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- Beiträge: 13
- Registriert: So Mai 11, 2008 6:43 pm
Hi Guys,
hope all is well,
I have a slight issue with one channel, the release time in the last 1-2dB's is super slow, almost 60 seconds to return to zero in the last dB..
i have not had time to look at any great detail, just thought id ask first for ideas as i thought that the release time was only set by the T4...i have changed the T4 but no change...
hope you guys can help,
all the best
Pete
hope all is well,
I have a slight issue with one channel, the release time in the last 1-2dB's is super slow, almost 60 seconds to return to zero in the last dB..
i have not had time to look at any great detail, just thought id ask first for ideas as i thought that the release time was only set by the T4...i have changed the T4 but no change...
hope you guys can help,
all the best
Pete
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- Beiträge: 13
- Registriert: So Mai 11, 2008 6:43 pm
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- Beiträge: 13
- Registriert: So Mai 11, 2008 6:43 pm
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- Registriert: Do Apr 26, 2007 2:11 pm
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Stupid question regarding the BOM (I hope no one asked this already, I only read until page 8 ):bernbrue hat geschrieben:Hi,
here is an Excel Partlist and the pcb component placement as pdf. I mailed DRIP, the price for a T4B remake is 90 USD. Will ask him for a price reduction in case we order more than ten.
http://www.twin-x.com/groupdiy/albums/u ... nt_Art.xls
Are the "Part Size/Name"s order numbers from any supplier?
Most of the text there is not clear to me.
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moin,
the TBD resistors are the ones you get with (original) T4Bs.
normaly 33K IIRC.
T4Bs can be bought from
http://www.studioelectronics.biz (NOS)
or from dripelectronics at prodigy (clones)
the TBD resistors are the ones you get with (original) T4Bs.
normaly 33K IIRC.
T4Bs can be bought from
http://www.studioelectronics.biz (NOS)
or from dripelectronics at prodigy (clones)
volker
olafmatt hat geschrieben:Strom kann tot machen
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- Beiträge: 21
- Registriert: Fr Sep 12, 2008 2:03 am
Hi Bernd , have you got a pic to post to show the placement of your output tx???(Maybe the pics in the first post are the ones??)bernbrue hat geschrieben:So be aware, where you put the output tx.
regards
Bernd
Thx by advance.
Edit : oooops , forgot to mention I was new (first post).I'm very excited to start my christmas pcbs.Thx to all of you guys.
regards , T.