samsie

Boards arrived safely Thanks

paid

Please update my order. 4x GRHVxxx (assembled) 6x GRLV78xx 6x GRLV79xx 2x main board 1x mini t2 board Thanks Sam

Dear Kevin, I find the heater power supply portion to be rather handy. Would you please cut the HV supply portion away so that I can use the heater power supply portion for mini T2 project? Thanks Sam

The amp was getting really hot at 70°C. It was running at 22.5 mA. I have to reduce the bias current. Should I change the 2k ohm resistor or the 500k one? I am a bit confused.

understood. thanks to you all

CFA2 (CFP) - current feedback amp I still cannot figure out how to connect them into balanced version of CFA2 (CFP) - current feedback amp as they are single end type of pcb. I know I need four boards, but how do I connect the negative input rail ? Your help is much appreciated.

And how do you do the printing? Sam

This was completed an hour ago. It worked though I did not do any measurement. I tried it with my only planar Hifiman HE6. The volume was a dummy. I used a preamp. I could not afford a decent volume control for individual headamps.

One set for me, please

thanks all, I ordered. I know I'll have to handle SMD sooner or later. In the mean time, I am searching on the web regarding how to mount the TPS7A3301 and TPS7A4001 directly on the board. Maybe I could finish it before the modules arrive? Sam

Please help me with the TPS7A3301 modules, I could only find this https://www.ebay.com/itm/TPS7A3301-Ultralow-noise-LDO-regulator-3V-18V-1V-step-1A-LM337-79x-replace/253593923500 It appears that it could only provide -18v, not the -20. Am I missing something? After spending half a day staring at the pcb without any progress. I gave up on soldering the chips to the board by myself.

Payment sent. thanks

agree, yes, four sets power supplies, many projects to be completed. I changed the quantity to 2 sets

sorry, a bit too much for me. Maybe I would join in when there is a group buy for a set of transformers sam