hello I have been following this thread since the begining and I am very interested, but with not working (tuff times), I am low on funds , So has anyone had the time to finish thier builds, could you give some listening impressions, how does it compare to other amps you have ? THANKS for any info - dean
hallcon83 said:
The completed ones have appeared in the Krill construction thread with some reviews.
Mine is done (not with steves boards or output transistors) and I'm pleased, its substituted for my lecson AP1 poweramp in my system and is I think a bit better mainly in the base.
Alan
MJL21193 said:Hi Steve,
Cool power supply scheme.
🙂
Hi again,
Are D20 and D22 oriented correctly?
🙂
MJL21193 said:
Hi John
The 50W version that I built has those diodes flipped (and mine has been fired up and tested) - so you are correct - good save!!! 😀
Take a look back at post 409, 410 and 413.
I'm interested in how your amp comes out!!
MJL21193 said:
Hopefully that is the last correction that I will need to make. Thanks for the catch. Here is the corrected schematic.
Hi Thomas,
I know this is a sensitive issue with some of the more knowledge people here, but how do they sound?
Could you re post the stuffing guide you did for the boards? The paper copies I have been working with aren't clear enough for some people to make out everything. Thanks.
I know this is a sensitive issue with some of the more knowledge people here, but how do they sound?
Could you re post the stuffing guide you did for the boards? The paper copies I have been working with aren't clear enough for some people to make out everything. Thanks.
Steve Dunlap said:
Hi Steve (and da rest of Ya)
Sad to say I've been to busy with Susan to get anything done with the amps. Long story short - after seeing seveal different flavors of Dr's (all very good) she is getting a Pacemaker installed this coming week. Plus I've been wanting to put the amps into a case before I put 'em through their paces. Figuring the case will help to cut down shielding and interference problems. Perhaps I'm being a little to cautious about that - but I'll see if I can get back to things.
Man - finding case and chassis in USA is hard to do - looks as if I'm gonna wind up doing a Hammond box and add some wood and faceplate pretty up's to get things looking decent. That's not quite what I wanted to do and I might still go with modding a HTPC case. Time to get to work I guess!!!!
Oh yeah - the other problem - my old PC was getting sick (hey - I'm a PC) so I loaded up a newer one and the stuffing guide is over on the old PC. Give me a chance to load up some software and do a file xfer and I'll post the guide a little later today.
Hi Thomas,
Sorry to hear Susan is having more health problems. Take care of her first.
Don't forget the on line metals source. They cut to size at no extra charge. There is a limit of two cuts per piece, but that usually works. I think I know a place locally that can help with the finish work and drilling. 😀
Sorry to hear Susan is having more health problems. Take care of her first.
Don't forget the on line metals source. They cut to size at no extra charge. There is a limit of two cuts per piece, but that usually works. I think I know a place locally that can help with the finish work and drilling. 😀
Hi Steve,
I think that on the schematic the voltage rating of C3, C4 should be 63V instead of 100V. BOM is ok.
Not so important, but a little bit confusing.
Hi Thomas tell Susan not to worry. Pacemakers are like identification chips these days. And the most important is having a DIYer husband she doesn't have to worry about the PSU 😉 (joke of course)
I think that on the schematic the voltage rating of C3, C4 should be 63V instead of 100V. BOM is ok.
Not so important, but a little bit confusing.
Hi Thomas tell Susan not to worry. Pacemakers are like identification chips these days. And the most important is having a DIYer husband she doesn't have to worry about the PSU 😉 (joke of course)
Hello All - esp. Steve and Marinos and JK
Thank Your for your kind wishes and prayers. Susan and I are most confident with her Doctor's and the procedure. After my 5 way by-pass last year this is a walk in the park. 🙄
Marinos - the solid state amps will only hurt you for a little while - the tube amps will BITE you goooooood
I got nailed by 600VDC B+ back around 1970 and it's a good thing that I had my wrist in contact with the metal chassis (good safety trick) so it only got me in the hand. That was the 1st and only time I got nailed (whew) and that was because the ship was rolling around and I lost my footing for a second. Getting around the 100Kv stuff can make the hair on your arms stand up tho - 
Hmmm - I wonder if putting in some better caps will smooth out any 2nd or 3rd harmonics on that Pacemaker thingie?? 
Thank Your for your kind wishes and prayers. Susan and I are most confident with her Doctor's and the procedure. After my 5 way by-pass last year this is a walk in the park. 🙄
Marinos - the solid state amps will only hurt you for a little while - the tube amps will BITE you goooooood
I got nailed by 600VDC B+ back around 1970 and it's a good thing that I had my wrist in contact with the metal chassis (good safety trick) so it only got me in the hand. That was the 1st and only time I got nailed (whew) and that was because the ship was rolling around and I lost my footing for a second. Getting around the 100Kv stuff can make the hair on your arms stand up tho - Hmmm - I wonder if putting in some better caps will smooth out any 2nd or 3rd harmonics on that Pacemaker thingie??
hi Steve...i wanna build your amps..curious about how the sound is?.. i can read schemathic but i wanna make pcb my self ..then i need pcb schematic both for 50w and 100w ..thx. . (my email is ferynov at gmail.com) thx for your help.
-best regards-
fery
-best regards-
fery
Hi ferynov;
I have pretty much avoided saying anything about the sound for a number of reasons. The sound that people like is very subjective. Some people prefer different sounds. Some people claim all amps sound the same.
I personally think my amps sound very good, but then most designers do.
I will E-mail you the schematics and BOM for both amps.
I have pretty much avoided saying anything about the sound for a number of reasons. The sound that people like is very subjective. Some people prefer different sounds. Some people claim all amps sound the same.
I personally think my amps sound very good, but then most designers do.
I will E-mail you the schematics and BOM for both amps.
Hi Steve, i receive your email and attachment...i agree that sound is personal sense ... but i wanna try to make some device, then i can compare them ... fyi i have been build GC LM3875 and paired with B1 buffer from Nelson Pass, to me sound is good enough...thanks for your help.
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