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GB "long and skinny" FirstWatt J2 clone PCBs
GB "long and skinny" FirstWatt J2 clone PCBs
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Old 16th October 2019, 03:26 PM   #171
JeffYoung is online now JeffYoung  Ireland
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Join Date: Jul 2017
Location: Ireland
GB "long and skinny" FirstWatt J2 clone PCBs
JeffYoung 1 set RECEIVED
Reima 1 set RECEIVED
yoaudio 1 set RECEIVED
mordikai 1 set RECEIVED
blackdod 1 set RECEIVED
badrisuper 1 set RECEIVED
Skunark 2 sets RECEIVED
Dennis Hui 1 set RECEIVED
chromenuts 1 set RECEIVED
Eric 1 set RECEIVED
secanbj 1 set RECEIVED
hifibluedevil 1 set RECEIVED
JoeyDD 1 set RECEIVED
baggerbole 1 set RECEIVED
vasilis 1 set RECEIVED
mordikai 1 set + twin pair 2SK170 RECEIVED
Russelc 1 set RECEIVED
gary s 1 set RECEIVED thanks Jeff.
MEPER 1 set RECEIVED
Quantensprung 1 set RECEIVED (the coolest package ever)
bk856er 1 RECEIVED
hifibluedevil twin-pair 2SK170 RECEIVED
samoloko 1 set RECEIVED
Olderthandirt 1 set RECEIVED
Vitalica 1 set RECEIVED
Rolle 1 set DELIVERED (according to An Post)

JimS 1 set SHIPPED
astromo 1 set SHIPPED
Gyuri 1 set SHIPPED

——-

Malvin 1 set
pfisla 2 sets
Myint67 1set
twitchie 1 set
gig 1 set
flamethrower1 1 set
necplusultra 1 set
vvs07 2 sets
Dr.Strangelove3 1 set
WBS ???
malisz ???
dieter12 2 sets
Fabian85 ???
Scott Stansbury - 1 set
pistollero - 2 set
nashbap 1set
mlwebb 1 set
Ibuell 1 set
  Reply With Quote
Old 16th October 2019, 11:52 PM   #172
JeffYoung is online now JeffYoung  Ireland
diyAudio Member
 
JeffYoung's Avatar
 
Join Date: Jul 2017
Location: Ireland
GB "long and skinny" FirstWatt J2 clone PCBs
JeffYoung 1 set RECEIVED
Reima 1 set RECEIVED
yoaudio 1 set RECEIVED
mordikai 1 set RECEIVED
blackdod 1 set RECEIVED
badrisuper 1 set RECEIVED
Skunark 2 sets RECEIVED
Dennis Hui 1 set RECEIVED
chromenuts 1 set RECEIVED
Eric 1 set RECEIVED
secanbj 1 set RECEIVED
hifibluedevil 1 set RECEIVED
JoeyDD 1 set RECEIVED
baggerbole 1 set RECEIVED
vasilis 1 set RECEIVED
mordikai 1 set + twin pair 2SK170 RECEIVED
Russelc 1 set RECEIVED
gary s 1 set RECEIVED thanks Jeff.
MEPER 1 set RECEIVED
Quantensprung 1 set RECEIVED (the coolest package ever)
bk856er 1 RECEIVED
hifibluedevil twin-pair 2SK170 RECEIVED
samoloko 1 set RECEIVED
Olderthandirt 1 set RECEIVED
Vitalica 1 set RECEIVED
Rolle 1 set DELIVERED (according to An Post)
JimS 1 set RECEIVED

astromo 1 set SHIPPED
Gyuri 1 set SHIPPED

——-

Malvin 1 set
pfisla 2 sets
Myint67 1set
twitchie 1 set
gig 1 set
flamethrower1 1 set
necplusultra 1 set
vvs07 2 sets
Dr.Strangelove3 1 set
WBS ???
malisz ???
dieter12 2 sets
Fabian85 ???
Scott Stansbury - 1 set
pistollero - 2 set
nashbap 1set
mlwebb 1 set
Ibuell 1 set
  Reply With Quote
Old 17th October 2019, 09:28 AM   #173
Gyuri is offline Gyuri  Hungary
diyAudio Member
 
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Join Date: Nov 2003
Location: Budapest
JeffYoung 1 set RECEIVED
Reima 1 set RECEIVED
yoaudio 1 set RECEIVED
mordikai 1 set RECEIVED
blackdod 1 set RECEIVED
badrisuper 1 set RECEIVED
Skunark 2 sets RECEIVED
Dennis Hui 1 set RECEIVED
chromenuts 1 set RECEIVED
Eric 1 set RECEIVED
secanbj 1 set RECEIVED
hifibluedevil 1 set RECEIVED
JoeyDD 1 set RECEIVED
baggerbole 1 set RECEIVED
vasilis 1 set RECEIVED
mordikai 1 set + twin pair 2SK170 RECEIVED
Russelc 1 set RECEIVED
gary s 1 set RECEIVED thanks Jeff.
MEPER 1 set RECEIVED
Quantensprung 1 set RECEIVED (the coolest package ever)
bk856er 1 RECEIVED
hifibluedevil twin-pair 2SK170 RECEIVED
samoloko 1 set RECEIVED
Olderthandirt 1 set RECEIVED
Vitalica 1 set RECEIVED
Rolle 1 set DELIVERED (according to An Post)
JimS 1 set RECEIVED
Gyuri 1 set RECEIVED Many thanks, Jeff!

astromo 1 set SHIPPED

——-

Malvin 1 set
pfisla 2 sets
Myint67 1set
twitchie 1 set
gig 1 set
flamethrower1 1 set
necplusultra 1 set
vvs07 2 sets
Dr.Strangelove3 1 set
WBS ???
malisz ???
dieter12 2 sets
Fabian85 ???
Scott Stansbury - 1 set
pistollero - 2 set
nashbap 1set
mlwebb 1 set
Ibuell 1 set
__________________
Those who would have deserved the life they are all dead already. "Oh, my dead dears!" - Captain Cat
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Old 18th October 2019, 12:10 AM   #174
astromo is offline astromo  Australia
diyAudio Member
 
astromo's Avatar
 
Join Date: Nov 2017
Location: BFN
JeffYoung 1 set RECEIVED
Reima 1 set RECEIVED
yoaudio 1 set RECEIVED
mordikai 1 set RECEIVED
blackdod 1 set RECEIVED
badrisuper 1 set RECEIVED
Skunark 2 sets RECEIVED
Dennis Hui 1 set RECEIVED
chromenuts 1 set RECEIVED
Eric 1 set RECEIVED
secanbj 1 set RECEIVED
hifibluedevil 1 set RECEIVED
JoeyDD 1 set RECEIVED
baggerbole 1 set RECEIVED
vasilis 1 set RECEIVED
mordikai 1 set + twin pair 2SK170 RECEIVED
Russelc 1 set RECEIVED
gary s 1 set RECEIVED thanks Jeff.
MEPER 1 set RECEIVED
Quantensprung 1 set RECEIVED (the coolest package ever)
bk856er 1 RECEIVED
hifibluedevil twin-pair 2SK170 RECEIVED
samoloko 1 set RECEIVED
Olderthandirt 1 set RECEIVED
Vitalica 1 set RECEIVED
Rolle 1 set DELIVERED (according to An Post)
JimS 1 set RECEIVED
Gyuri 1 set RECEIVED Many thanks, Jeff!
astromo 1 set RECEIVED

—————————————————

Malvin 1 set
pfisla 2 sets
Myint67 1set
twitchie 1 set
gig 1 set
flamethrower1 1 set
necplusultra 1 set
vvs07 2 sets
Dr.Strangelove3 1 set
WBS ???
malisz ???
dieter12 2 sets
Fabian85 ???
Scott Stansbury - 1 set
pistollero - 2 set
nashbap 1set
mlwebb 1 set
Ibuell 1 set




—————————————————


Oh, right, I thought you'd just sent me a lump of MDF. Silly me.

Nice packaging. Clever plan.

Thanks Jeff
Attached Images
File Type: jpg 20191006 J2 PCB Package.jpg (638.7 KB, 175 views)
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Old 19th October 2019, 06:37 AM   #175
GnuB is offline GnuB  United States
diyAudio Member
 
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Join Date: Feb 2014
Location: Fremont CA
Here's hoping there's a couple left....


JeffYoung 1 set RECEIVED
Reima 1 set RECEIVED
yoaudio 1 set RECEIVED
mordikai 1 set RECEIVED
blackdod 1 set RECEIVED
badrisuper 1 set RECEIVED
Skunark 2 sets RECEIVED
Dennis Hui 1 set RECEIVED
chromenuts 1 set RECEIVED
Eric 1 set RECEIVED
secanbj 1 set RECEIVED
hifibluedevil 1 set RECEIVED
JoeyDD 1 set RECEIVED
baggerbole 1 set RECEIVED
vasilis 1 set RECEIVED
mordikai 1 set + twin pair 2SK170 RECEIVED
Russelc 1 set RECEIVED
gary s 1 set RECEIVED thanks Jeff.
MEPER 1 set RECEIVED
Quantensprung 1 set RECEIVED (the coolest package ever)
bk856er 1 RECEIVED
hifibluedevil twin-pair 2SK170 RECEIVED
samoloko 1 set RECEIVED
Olderthandirt 1 set RECEIVED
Vitalica 1 set RECEIVED
Rolle 1 set DELIVERED (according to An Post)
JimS 1 set RECEIVED
Gyuri 1 set RECEIVED Many thanks, Jeff!
astromo 1 set RECEIVED

—————————————————

Malvin 1 set
pfisla 2 sets
Myint67 1set
twitchie 1 set
gig 1 set
flamethrower1 1 set
necplusultra 1 set
vvs07 2 sets
Dr.Strangelove3 1 set
WBS ???
malisz ???
dieter12 2 sets
Fabian85 ???
Scott Stansbury - 1 set
pistollero - 2 set
nashbap 1set
mlwebb 1 set
Ibuell 1 set
Gnub 2 sets (will settle for 1 pair


Thanks!
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Old 19th October 2019, 11:12 AM   #176
JeffYoung is online now JeffYoung  Ireland
diyAudio Member
 
JeffYoung's Avatar
 
Join Date: Jul 2017
Location: Ireland
GB "long and skinny" FirstWatt J2 clone PCBs
The first run have all found their homes.

There appears to be plenty of interest for a second run. However, I want to make sure the boards work first. Mine are built and bias up nicely, but I'm waiting on speaker binding posts to finish it up and make sure it plays music.

In the mean-time, feel free to add yourself to the list:

Malvin 1 set
pfisla 2 sets
Myint67 1set
twitchie 1 set
gig 1 set
flamethrower1 1 set
necplusultra 1 set
vvs07 2 sets
Dr.Strangelove3 1 set
WBS ???
malisz ???
dieter12 2 sets
Fabian85 ???
Scott Stansbury - 1 set
pistollero - 2 set
nashbap 1set
mlwebb 1 set
Ibuell 1 set
Gnub 2 sets
  Reply With Quote
Old 19th October 2019, 02:40 PM   #177
JeffYoung is online now JeffYoung  Ireland
diyAudio Member
 
JeffYoung's Avatar
 
Join Date: Jul 2017
Location: Ireland
GB "long and skinny" FirstWatt J2 clone PCBs
Also looking for a volunteer to run the next GB. Carsten did the F3 run and I did the first J2 run, and we're both looking to spend a bit less of our time in the post office.
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Old 19th October 2019, 03:15 PM   #178
spades is online now spades  United Kingdom
diyAudio Member
 
Join Date: Jan 2004
In the mean-time, feel free to add yourself to the list:

Malvin 1 set
pfisla 2 sets
Myint67 1set
twitchie 1 set
gig 1 set
flamethrower1 1 set
necplusultra 1 set
vvs07 2 sets
Dr.Strangelove3 1 set
WBS ???
malisz ???
dieter12 2 sets
Fabian85 ???
Scott Stansbury - 1 set
pistollero - 2 set
nashbap 1set
mlwebb 1 set
Ibuell 1 set
Gnub 2 sets
Spades 1 set
  Reply With Quote
Old 19th October 2019, 10:20 PM   #179
gary s is offline gary s  Australia
diyAudio Member
 
Join Date: Nov 2002
Location: Australia
Hi Jeff.

All good news on your build progress, what bias / quiescent current did you settle on for the output stage and I look forward to any comments/impressions you might have after your first listening session.

Cheers,

Gary..
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Old 19th October 2019, 10:55 PM   #180
JeffYoung is online now JeffYoung  Ireland
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Join Date: Jul 2017
Location: Ireland
GB "long and skinny" FirstWatt J2 clone PCBs
Hi Gary,

It came out at a bit over 1.4A.

(Note that there's no potentiometer to set it in this topology: it's a function of the source resistors and bias resistors.)

Cheers,
Jeff.
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