I need comments about "100W power amp. elektor april 1982"

[guido]

Ok,

Now we are at it, here's the (a) list of elektor stuff i know of:

apr 82 - 100 watter with BDX67/BDX66
dec 82 - cresendo
may 84 - mini cresendo with 2SK135/2SJ50
mar 85 - AXL with 2SK134/2SJ49
nov 88 - LFA 150 with 2SA1095/2SC2565
okt 90 - power amp with BD911/912
okt 91 - LFA-50-OA class A amp with 2SA1216/2SC2922
feb 94 - ulti-amp with 2SC2922/2SA1216 (better poweramp)
apr 01 - cresendo ME with 2SK1530/2SJ201

There also was a LFA150 or 50 version for electrostatic speakers iircc.

older designs than 82: EKWA, EKWIN, a 200 watt amp and the Elektornado (100w bridged). They also published tube amps and some smaller schematics (opamp+mosfet, single chip stuff, A+B amp) over the years.

Dont forget to read 'het lek'

[jaycee]

Originally posted by jinkuchi
thank you jmateus.

now I want to built ESP project 3A.
But I can't buy MJL4302 mjl4281 in Thailand.
I found MJL21193 MJL21194, can I use them instead?

Can I use TIP3055 TIP2955 ?

MJL21193/21194 will work fine in the P3A, and Rod actually recommends those if you can't source MJL4281/4302.

TIP3055/2955 are far too low power, and would probably blow up. MJ2955/2N3055 may work but it is not worth it if you can get MJL21193/21194's

[jacco vermeulen]

I just recovered the article on the Elektor 1982 100-watter.
If someone is interested i can scan the layout and place it on this thread.

[thanh]

- Reduce C7 and C8 to 10 picofarads

carlos! I dont' use these capacitor .
I remark that the more these value is high and the more humm noise is big

[sivan_and]

jacco vermeulen !! PLEASE POST......
Elektor 1982 100-watter
THANX !!!

[jacco vermeulen]

here goes, i am still not impressed by the thing

[jacco vermeulen]

layout

[jacco vermeulen]

PCB for the caps

[jacco vermeulen]

specs

[jacco vermeulen]

Graph for the power output at different frequencies at 4 Ohm load