I echo those sentiments and highly value PD's years of experience and efforts to not only design these very high quality boards but to also organise the manufacture, distribution, financing, etc, etc.
Many thanks, Peter - much appreciated ... jh
Many thanks, Peter - much appreciated ... jh
Srajan Ebaen said:
Hi Srajan,
Since I mentioned that the boards will be offered to Forum members only, I would prefer if my name was not mentioned in a 6moons F4 write up. I prefer to keep Audiosector business separate from my diy activity on this Forum. Besides, when this is non profit, 'advertising' can only create more hassle for me 😉
Gotcha, Peter.
This only came up because tvad mentioned it - and he, I'm sure, mentioned it only to give credit where due rather than having it appear his amp was all done up from *complete* scratch by himself. But seeing the nature of this, I agree, there's nothing gained in a formal review of the F4 by confusing the issue for bystanders and bring up the name of another commercial manufacturer (or having to explain what it really means).
Easy does it so you've just been erased -🙂
Hey, if you're near to completing anything cool and new for AudioSector, keep my in the loop. Still loving my Pateks and the step-down transformers work day and night completely noise-free.😀
This only came up because tvad mentioned it - and he, I'm sure, mentioned it only to give credit where due rather than having it appear his amp was all done up from *complete* scratch by himself. But seeing the nature of this, I agree, there's nothing gained in a formal review of the F4 by confusing the issue for bystanders and bring up the name of another commercial manufacturer (or having to explain what it really means).
Easy does it so you've just been erased -🙂
Hey, if you're near to completing anything cool and new for AudioSector, keep my in the loop. Still loving my Pateks and the step-down transformers work day and night completely noise-free.😀
Could a generous diyer help me out with some jfets for the front section 2sk370,2sj108 which are hard to find here and very expensive to have couriered from the US?
I could pay with paypal of course.
I could pay with paypal of course.
Hmmm... have to see how many i have as burned through some playing with jfet boz. I get them from mcmelectronics.com, around a buck each. I imagine postage would not be too much in an envelope where i could pick them up for you if company (mcm) not being reasonable.
I guess I will opt for the 2sk170 , 2sj74 - as these are being touted as the replacement for the 2sk370,2sj108---can´t find the data sheet yet.
Just that some companies charge a huge shipping charge plus usually send via priority mail.In Tech diy case for example shipping/handling charge is 12 usd for int´l orders plus about 18 usd for priority mail so 30 usd in all for 4-8 usd worth of components.
Maybe I should order 100 to keep my shipping costs down
Just that some companies charge a huge shipping charge plus usually send via priority mail.In Tech diy case for example shipping/handling charge is 12 usd for int´l orders plus about 18 usd for priority mail so 30 usd in all for 4-8 usd worth of components.
Maybe I should order 100 to keep my shipping costs down
protos said:I guess I will opt for the 2sk170 , 2sj74 - as these are being touted as the replacement for the 2sk370,2sj108---can´t find the data sheet yet.
Just that some companies charge a huge shipping charge plus usually send via priority mail.In Tech diy case for example shipping/handling charge is 12 usd for int´l orders plus about 18 usd for priority mail so 30 usd in all for 4-8 usd worth of components.
Maybe I should order 100 to keep my shipping costs down
I have the 2SK10 and 2SJ74 etc datasheets. I can email them.
RK
get lost...
i was just finishing my BOM according to F4 R0 04/17/07 when i noticed a new version (06/04/07) with different bias/jfet/shunt resistors.
I browsed the post but i cannot find informations about that, what's the difference between the 2 versions?
I've got many 0,5R 3W resistors handy, can i use them as source resistors and simply adjust P1 to measure 265mV across them?
Many thanks,
Marco
i was just finishing my BOM according to F4 R0 04/17/07 when i noticed a new version (06/04/07) with different bias/jfet/shunt resistors.
I browsed the post but i cannot find informations about that, what's the difference between the 2 versions?
I've got many 0,5R 3W resistors handy, can i use them as source resistors and simply adjust P1 to measure 265mV across them?
Many thanks,
Marco
That information does exist in this thread, but suffice it to
say the revisions were minor, and related most specifically
to providing more margin and protection to the input JFETs
gainst overdrive on the input.
😎
say the revisions were minor, and related most specifically
to providing more margin and protection to the input JFETs
gainst overdrive on the input.
😎
Hi Marginwalker !
You can have a look here :
http://www.diyaudio.com/forums/showthread.php?postid=1245667#post1245667
Post # 287, BOM to download according to the last Mr PASS input (Many thanks Mr PASS).
Hope it will be usefull.
You can have a look here :
http://www.diyaudio.com/forums/showthread.php?postid=1245667#post1245667
Post # 287, BOM to download according to the last Mr PASS input (Many thanks Mr PASS).
Hope it will be usefull.
Well, I think I'm going to bite the bullet and build some of these amps for the big speakers I'm in the process of building. To the darkside tubeboy goes.
I'll send off an order to Peter soon for boards for 8 channels.
I'll send off an order to Peter soon for boards for 8 channels.
There is an update to the 6Moons Review...
http://www.6moons.com/audioreviews/firstwatt6/f4.html
😀
I started laying out the parts on a piece of MDF last night to figure out how I am going to arrange things. I can't wait to finish....then on to a preamp that can drive them.
C
http://www.6moons.com/audioreviews/firstwatt6/f4.html
😀
I started laying out the parts on a piece of MDF last night to figure out how I am going to arrange things. I can't wait to finish....then on to a preamp that can drive them.
C
korben69 said:
Thanks Korben! Now it's time to find a chassis and build my first Pass project
Hi Marginwalker, you're wellcome !
Same for me, time to find a chassis, I've got the heatsinks.
It's my first PASS amp, maybe others to come...
Your search could be usefull to me, hifi2K ?
Let us know about your search.
Same for me, time to find a chassis, I've got the heatsinks.
It's my first PASS amp, maybe others to come...
Your search could be usefull to me, hifi2K ?
Let us know about your search.
Re: There is an update to the 6Moons Review...
I expect yet another soon.
😎
chrismercurio said:
I expect yet another soon.
😎
korben69 said:
i'd like to build a chassis by myself because ready made are a bit expansive (100+ euro). tomorrow i'll take a tour in the wrackage dump looking for a couple of big ugly heatsinks 😉
if you want a good looking chassis try http://www.modushop.biz, maybe you'll be able to customize a galaxy chassis to your own heatsinks.
Take a look to 'pesante dissipante' line too, it looks good and has got huge heatsinks too. you can spare yours for the next project 😉
Otherwise, you can use heatsinks to build a solid structure with nuts&bolts and finish it with plexy (easy and good looking, i'll try this way).
Ciao
Marco