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Audioromy M828A/829B FU29 Bias/Balance Help | diyAudio
https://www.diyaudio.com/community/threads/audioromy-m828a-829b-fu29-bias-balance-help.285152/
Hi All, Ok so this is my first post here so Hi. Picked up an Audioromy m828a FU29 tube amp from ebay - came quick, seems pretty well made. I wanted to get the Bias and Balance right before I started using it extensively, so went about looking at it's guts.
Adjusting BIAS on AUDIOROMY FU29 - popular-hifi.com
http://www.popular-hifi.com/projects/nad_stereo/audioromy_fu29/Adjusting_BIAS_on_AUDIOROMY_FU29.pdf
Adjusting BIAS on AUDIOROMY FU29 I just got details back from the seller and here are the bias instructions for anyone else that ... I have swapped out the 6n23p's for 6n1p-ev and swapped the fu29's for gu-29's and have ordered 6n3p-ev's to replace the 6n3 Chinese tubes.
Monitor and adjust BIAS and tube BALANCE on AUDIOROMY M
http://www.popular-hifi.com/projects/nad_stereo/audioromy_fu29/BIAS_Adjustment_Audioromy_fu29_v2.pdf
Using two multi instruments to monitor and adjust BIAS and BALANCE on Audioromy M-828A When you look inside the amplifier you find out that there is a white lead going from cathode (Pin4/5) on one final tube, over to cathode (Pin4/5) on the other final tube, from one of the tubes there is then going a white lead ...
LM317 BIAS Regulator on AUDIOROMY M - popular-hifi.com
http://www.popular-hifi.com/projects/nad_stereo/audioromy_fu29/LM317_BIAS_Regulator_on_AUDIOROMY.pdf
LM317 BIAS Regulator on AUDIOROMY M-828A Using a regulator circuit to limit the cathode current just above 53mA (Max) - Uses a LM317 regulator that is controlled by a series resistor between the ADJ and OUT. I Have tried this before in a MUSIC ANGEL MINI L4 amplifier. The idea is that with the regulator circuit to
AUDIOROMY M-828A - SM2YER Goran's homepage
http://www.popular-hifi.com/projects/nad_stereo/audioromy_fu29/
AUDIOROMY M-828A är en integrerad rör-förstärkare med den något ovanliga dubbel Tetroden FU29 i push-pull koppling på utgången, i ingången sitter 4st 6N3 dubbel trioder. Har provat förstärkare från denna tillverkare vid ett tidigare tillfälle, den gången var det en AUDIOROMY M-6V6 modellen som stod på testbänken.
AudioRomy FU29 -Class A tube magic Integrated tube-30wpc ...
https://www.audiogon.com/listings/audioromy-fu29-class-a-tube-magic-integrated-tube-30wp
AudioRomy FU29 in perfect condition with all original tubes, packaging etc. 30 wpc @.5%THD check out the reviews this amp punches way above it's weight. It arrived just as I got an offer on my Klipschorns and moved to Bozak speakers that like a bit more power. That said this amp was flawless in it's presentation with the power hungry Bozaks.
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