Dear Zinux,
Can I request you to please post the schematic also along side your PCB layout, even it is repeating ? That will reduce a lot of going forwards and backwards for readers.
--gannaji.
"BOM" of FH9
I'm building and I have this list:
0R47/2W
100nF C3
330pF C4
100nF C5
4.7pF C6
10uF C8
1000uF C9
47uF C10
47uF C11
100uF 63V C20
100uF 63V C21
100nF C22
100nF C23
100nF C24
100pF C4a
100pF C8a
4148 D1
4148 D2
4148 D3
4148 D4
4148 D5
1k P1
680 R1
22k R2
47 R3
47 R4
680 R5
680 R6
680 R7
680 R8
150 R9
22k R10
22k R11
680 R12
10 R13
10 R14
6k8 R15
47R R16
47R R17
220 R18
220 R19
220 R20
4R7/1W R22
BD139 T1
BD140 T2
MPSA92 T3
BC546 T4
BC546 T5
BC546 T6
BD139 T7
IRFP240 T8
IRFP9240 T9
Z12 Z1
Z12 Z2
I'm building and I have this list:
0R47/2W
100nF C3
330pF C4
100nF C5
4.7pF C6
10uF C8
1000uF C9
47uF C10
47uF C11
100uF 63V C20
100uF 63V C21
100nF C22
100nF C23
100nF C24
100pF C4a
100pF C8a
4148 D1
4148 D2
4148 D3
4148 D4
4148 D5
1k P1
680 R1
22k R2
47 R3
47 R4
680 R5
680 R6
680 R7
680 R8
150 R9
22k R10
22k R11
680 R12
10 R13
10 R14
6k8 R15
47R R16
47R R17
220 R18
220 R19
220 R20
4R7/1W R22
BD139 T1
BD140 T2
MPSA92 T3
BC546 T4
BC546 T5
BC546 T6
BD139 T7
IRFP240 T8
IRFP9240 T9
Z12 Z1
Z12 Z2
An externally hosted image should be here but it was not working when we last tested it.
Nice, thanks for doing this. Looks good.
This amp will not disappoint - it sounds great and has amazing bass extension. 🙂
Good luck on the build!
I would add that for FH9HV (120w into 8R with +/-52vdc rails) make the following changes:
47uF C10 --> 47uF 63v
47uF C11 --> 47uF 63v
BD139 T1 --> KSC3503
BD140 T2 --> KSA1381
BD139 T7 --> KSC3503
Try to match Hfe on T4 and T5 and DC offset should be under 5mV, typically 1-3mV.
Make sure all 4.7pF (C6), 100pF (C4a, C8a), and 330pF (C4) ceramic caps can handle 100v, preferably C0G/NP0 or 100v film caps
All 100nF caps should be rated 100v and are preferably film caps.
Note that FH9HV will work fine at +/-35v rails as well and gives flexibility to run any voltage in between.
Where did you get the image with part designators (R1, C1, etc)? The one I have just has the values (and still has older 20k and 550R values vs 22k and 680R).
Edit - I see the "mod by AdeS" - you made it - thanks.
This amp will not disappoint - it sounds great and has amazing bass extension. 🙂
Good luck on the build!
I would add that for FH9HV (120w into 8R with +/-52vdc rails) make the following changes:
47uF C10 --> 47uF 63v
47uF C11 --> 47uF 63v
BD139 T1 --> KSC3503
BD140 T2 --> KSA1381
BD139 T7 --> KSC3503
Try to match Hfe on T4 and T5 and DC offset should be under 5mV, typically 1-3mV.
Make sure all 4.7pF (C6), 100pF (C4a, C8a), and 330pF (C4) ceramic caps can handle 100v, preferably C0G/NP0 or 100v film caps
All 100nF caps should be rated 100v and are preferably film caps.
Note that FH9HV will work fine at +/-35v rails as well and gives flexibility to run any voltage in between.
Where did you get the image with part designators (R1, C1, etc)? The one I have just has the values (and still has older 20k and 550R values vs 22k and 680R).
Edit - I see the "mod by AdeS" - you made it - thanks.
Last edited:
T7 can stay as BD139 as it is the Vbe multiplier transistor. Putting here KSC3503 is waste....
Marc
I suppose a BD139 as Vbe multiplier can work - I wasn't sure if it would ever *not* get exposed to full rail-to-rail voltage of 100v.
Hello AdeS!
A BoM can be very helpful for people like me (not new in building amplifiers but over many years out of business). Recommended by xrk971 I focus on FH9HV which fits well to my existing PSU. Could u please publish her your Gerber/sprint files?
Do u have your BoM in Excel? Even a conversion from another format wouldn't be a problem. So if u could it post too, would be great.
@xrk971 many hours reading posts even didn't make me sure: but V1.05 should be the last version? I could only find gerber files but no sprint file for this! In case AdeS hasn't sprint file, could you provide the V1.05 sprint file?
Many thanks in advance!
Erwin
Eaglemaster,
I used Gerber v1.05 from this post:
http://www.diyaudio.com/forums/soli...imate-fidelity-amplifier-746.html#post4718422
It's not labeled with part numbers but only values. Not hard to figure out though. I don't make Gerbers so you will have to ask Sonal Kunal to update the file or ask AdeS for his/her Gerber file.
Good luck with the build!
Tips: stuff and solder all small resistors and diodes first, then small caps, then small transistors, then spade connectors pots and terminal blocks. Then big caps, then output MOSFET and driver VAS.
Set pot to about 400ohm for initial startup. Use a 10w 10R power resistor in series with rail supply lines and clip DMM across 10ohm and monitor as you switch on. If volts across 10R < 2 to 3v you are ok and adjust trim pot to get about 1.75v. If large voltage like 12v to 25v, shutoff immediately and find problem.
If all good remove 10R safety resistors and reconnect directly. Monitor voltage across dual 0.47R power resistors near output. Adjust trimpot for about 41mV to get 175mA.
Check DC offset with input grounded. Should be about 1mV to 5mV if the input LTPs were matched for Hfe.
Last edited:
Hello xrk971!
Many thanks for your link and the tips!
I indeed got the gerber files of V1.05 already. What I still would like to have is the sprint file for this. As far as I got it, you have only sprint file of V1.04. The only difference should be the 100 pF caps Mile suggested and, if I include the post of AdeS, the partnumbers. Ofc it is no rocket science to add it, butI guess AdeS has it already.
so @AdeS
If u have it could u please post it? About BoM: you didn't reply! It is the same here: is no rocket science to convert the data from u post to a excel file, but I guess you have it already?
In case AdeS has it not:
@ sonal kunal
at least you have the sprint file of V1.05 Would you please post it?
Maybe some of you may wonder my requests for sprint files: I might have to modify the position of fixing holes slightly due to my given mechanical layout.
I think AdeS has the latest Sprint file. You will either have to mod v1.04 or wait for AdeS to post it.
I would upgrade the electrolytic caps to 80v to give margin. The hex FETs can probably handle it - just 7v more than 53v.
You might want to do initial power up with 35v and verify that it works before moving up to 60v.
You might want to do initial power up with 35v and verify that it works before moving up to 60v.
Last edited: