hopjohn
Silver Face
I've read all the KR-9600 threads I could find here, but would like verification on a few things if anyone can help.
On each of the two power amp board it's been discussed that you should replace the differential pair Qe1 and Qe2 (2SC1345, ECB) with matching Zetex ZTX694B (noting CBE pinout) to get the DC offset as close to 0mv as possible. I assume all of the 4 hfe readings of the transistors are to be matched closely or is it just the individual pairs? I have 4 that are all read in the 745-760 range that I planned to use, but I also have 6 or so in the 1000-1285 range with scatterred readings. So which am I better off installing?
I've also seen noted as a preventative measure to replace Qe3 (2SC1775) with a ZTX694B, Qe6 and Qe7 (2SA912) with KSA1381, and Qe8 (2SC1885)with KSC3503. Are these each correct replacements?
Also does anyone source 8v 200ma mini bulb replacements for the four meter lights or do I need to improvise?
Thanks!
On each of the two power amp board it's been discussed that you should replace the differential pair Qe1 and Qe2 (2SC1345, ECB) with matching Zetex ZTX694B (noting CBE pinout) to get the DC offset as close to 0mv as possible. I assume all of the 4 hfe readings of the transistors are to be matched closely or is it just the individual pairs? I have 4 that are all read in the 745-760 range that I planned to use, but I also have 6 or so in the 1000-1285 range with scatterred readings. So which am I better off installing?
I've also seen noted as a preventative measure to replace Qe3 (2SC1775) with a ZTX694B, Qe6 and Qe7 (2SA912) with KSA1381, and Qe8 (2SC1885)with KSC3503. Are these each correct replacements?
Also does anyone source 8v 200ma mini bulb replacements for the four meter lights or do I need to improvise?
Thanks!
Last edited: