Receiver dashboard, on the left side, reflected instrument cables image is sharper on the left picture. Angle is slightly shifted. 🙂 I really have nothing to do...
Sorry Andrew i just didn't manage to remove the second att. posted by mistake few minutes later edit time was gone ..
Thanks though ...
You mean "no prize" !
There are hundreds of Members not posting in the last few days while they spend all their waking hours looking for the differences.
There are hundreds of Members not posting in the last few days while they spend all their waking hours looking for the differences.
HX11 test with +/-50,+/-70V rail voltage, output clip level is 40V RMS (400W at 4R)
HX11 Test - YouTube
HX11 Test - YouTube
300w per channel amp build
A few years back I was asked to build a slave amp for the local studio say about 300 watt per channel..so looking about the pile of odds and ends for a case and transformer/heatsinks etc.. I began to toy with a few idea of how things should look knowing the amplifier would be in daily use so it needed to be robust.
I could see the circuit in my head, so grabbing pen and paper whipped things up in half hour or so..things like fail safe ie short circuit proof plus relay cut off and trip cut off in case the cooling fan stopped working and things over heated.
In the end things turned out ok for a amp born out of things laying about in the spare parts box.. so here it is doing over 350 watts in to 4 ohms and no clipping.
Its still in use daily🙂
A few years back I was asked to build a slave amp for the local studio say about 300 watt per channel..so looking about the pile of odds and ends for a case and transformer/heatsinks etc.. I began to toy with a few idea of how things should look knowing the amplifier would be in daily use so it needed to be robust.
I could see the circuit in my head, so grabbing pen and paper whipped things up in half hour or so..things like fail safe ie short circuit proof plus relay cut off and trip cut off in case the cooling fan stopped working and things over heated.
In the end things turned out ok for a amp born out of things laying about in the spare parts box.. so here it is doing over 350 watts in to 4 ohms and no clipping.
Its still in use daily🙂
Attachments
Germanium transistors power amplifier with low distortion
90% finished power amplifier on germanium transistors.
I`m builder, but please follow link to autor of circuit -http://devicemusic.ucoz.ru/blog/25_vattnyj_bystrodejstvujushhij_usilitel_na_germanievykh_tranzistorakh/2011-02-12-4 (sorry, but Russian language only)
Specs:
Output power - 25W/4Ohm or 12,5W/8Ohm per channel
Range - 10-20kHz
Distortion - less than 0,1% at 1 kHz 10W/8Ohm
Idle current - ~0,35-0,45A
Transistors:
JFET1-JFET2 - K504NT3 (Si-JFET, К504НТ3, my be replaced pair 2SJ103)
Q100, Q102 - MP21A (GE-PNP, МП21А, http://lampilich.narod.ru/tr/small/mp20_21.html)
Q104, Q108 - ASY29 (GE-NPN, first version - MП38A - http://lampilich.narod.ru/tr/small/mp35_36_37_38.html)
Q105, Q106, Q107 - GT404G (GE-NPN, ГТ404Г, http://lampilich.narod.ru/tr/small/gt404.html)
Q111, Q112 - Р605A (GE-PNP, П605А, http://lampilich.narod.ru/tr/b_big/p605.html)
Q113, Q114 - 1T806A (GE-PNP, 1Т806А (mil spec grade) or ГТ806 (industrial grade) - http://lampilich.narod.ru/tr/b_big/gt806.html)
Sound:
Fast, clean, deep bass. Smooth high. Fantastic powerfull sound!
90% finished power amplifier on germanium transistors.
I`m builder, but please follow link to autor of circuit -http://devicemusic.ucoz.ru/blog/25_vattnyj_bystrodejstvujushhij_usilitel_na_germanievykh_tranzistorakh/2011-02-12-4 (sorry, but Russian language only)
Specs:
Output power - 25W/4Ohm or 12,5W/8Ohm per channel
Range - 10-20kHz
Distortion - less than 0,1% at 1 kHz 10W/8Ohm
Idle current - ~0,35-0,45A
Transistors:
JFET1-JFET2 - K504NT3 (Si-JFET, К504НТ3, my be replaced pair 2SJ103)
Q100, Q102 - MP21A (GE-PNP, МП21А, http://lampilich.narod.ru/tr/small/mp20_21.html)
Q104, Q108 - ASY29 (GE-NPN, first version - MП38A - http://lampilich.narod.ru/tr/small/mp35_36_37_38.html)
Q105, Q106, Q107 - GT404G (GE-NPN, ГТ404Г, http://lampilich.narod.ru/tr/small/gt404.html)
Q111, Q112 - Р605A (GE-PNP, П605А, http://lampilich.narod.ru/tr/b_big/p605.html)
Q113, Q114 - 1T806A (GE-PNP, 1Т806А (mil spec grade) or ГТ806 (industrial grade) - http://lampilich.narod.ru/tr/b_big/gt806.html)
Sound:
Fast, clean, deep bass. Smooth high. Fantastic powerfull sound!
Attachments
Last edited:
Great looking, clean build. And fantastic internal layout. 
Wonderful job and attention to detail. I love it.
Wonderful job and attention to detail. I love it.
small, but powerfull amp
I saw a case, including two quite large heat sinks on Alibaba.com lately. As it cost nearly nothing, I gave it a try, and bought one. VERY nice!!
I designed a small yet powerful amplifier lately, which is quite universal and simple. This design has been applied to numerous other projects in the past and sounds very good indeed. So, here we go: take a few of those fine 2SA1095 / 2SC2565 ringemitters, build everything nice and clean on the heat sink and squeeze a 300VA toroid in the middle of it all. It's not ready yet, but... it won't take long I hope!
And yes, all those connectors were inclued in the price of less than $ 50,- which should be reagarded as an absolute bargain! Even the mains switch (Alps!) and the turned, massive aluminum knob for the volume pot is included! I just ask myself: HOW can this be so cheap? Of course, it's made in China 😉
I saw a case, including two quite large heat sinks on Alibaba.com lately. As it cost nearly nothing, I gave it a try, and bought one. VERY nice!!
I designed a small yet powerful amplifier lately, which is quite universal and simple. This design has been applied to numerous other projects in the past and sounds very good indeed. So, here we go: take a few of those fine 2SA1095 / 2SC2565 ringemitters, build everything nice and clean on the heat sink and squeeze a 300VA toroid in the middle of it all. It's not ready yet, but... it won't take long I hope!
And yes, all those connectors were inclued in the price of less than $ 50,- which should be reagarded as an absolute bargain! Even the mains switch (Alps!) and the turned, massive aluminum knob for the volume pot is included! I just ask myself: HOW can this be so cheap? Of course, it's made in China 😉
Attachments
New sx-Amplifier build
Here's another sx-Amp that I built this week end. I bought another case like the one I used for the nx-Amp and started assembly yesterday. Its playing now through my B&W's (Houston Person 'Mellow' - very laid back Jazz CD).
🙂
The heatsinking on this case is very good compared to the old one. I'will be using the old one for a new 10W class A amp I am working on ('ux-Amplifier'). The ux-Amp is a CFA single ended input stage design with some similarities to the JLH 10 Watter - but enough of that for now.
Some pics
😎
Here's another sx-Amp that I built this week end. I bought another case like the one I used for the nx-Amp and started assembly yesterday. Its playing now through my B&W's (Houston Person 'Mellow' - very laid back Jazz CD).
🙂
The heatsinking on this case is very good compared to the old one. I'will be using the old one for a new 10W class A amp I am working on ('ux-Amplifier'). The ux-Amp is a CFA single ended input stage design with some similarities to the JLH 10 Watter - but enough of that for now.
Some pics
😎
Attachments
Case is from...??
Hello Bonsai,
where did you get that beautiful case? And what does it cost?
Thank you,
Timmo.
Hello Bonsai,
where did you get that beautiful case? And what does it cost?
Thank you,
Timmo.
325addict it's from Tang Hill International in Taipei it costs about $130. It's actually a Erno Borbelly amp case. If you order one, make sure it's the stereo version.