Now Im gonna put 90% for the chasis from now on. Im so damn jealous of the beautiful crafts displayed here. [/B][/QUOTE]
Hello,
10% is enough for the chassis, 10% to build the amp, but 80% id minimum for listening with...
This is my last project, the chassis was made from a piece of a old wooden box:
Tubes are the 717A and 1626, the chassis is 20 x 16 x 4 cm, this power amp makes 2 x 0,8 Watts
Gerd
Hello,
10% is enough for the chassis, 10% to build the amp, but 80% id minimum for listening with...
This is my last project, the chassis was made from a piece of a old wooden box:
An externally hosted image should be here but it was not working when we last tested it.
Tubes are the 717A and 1626, the chassis is 20 x 16 x 4 cm, this power amp makes 2 x 0,8 Watts
Gerd
10% is enough for the chassis, 10% to build the amp, but 80% id minimum for listening with...
We never finish tweaking. Once in a while something goes in/out
BTW, what tubes you used for the darling project? ken-rad, RCA, or any other types? I tried to search but never found out which types are more popular
skyraider said:
BTW, what tubes you used for the darling project? ken-rad, RCA, or any other types? I tried to search but never found out which types are more popular
Hello,
that I have got, no special brand. Currently they are from National Union Radio Corp.
I think, all brands are not made for AF-amplifiers, and so all are not perfect devices.
I am not searching for the tubes, I use that I have and build the amp around this....
Gerd
Bas Horneman said:Marvellous!!! She's a beauty allright! How does she sound? Do you have a schematic?
Hello,
it sounds very nice, but around 5% THD at 0,5Watts..
schematic comes later, I have to draw this.
Frequency response is 13Hz..26KHz -1dB
Gerd
Attachments
My 845.
For each monoblock:
Input transformer-Tamura STU-001 300,150 Ohm to 100 kOhm
with CT are connected to Class A Push-Pull driver (two El34 in triode mode). The driver stage are connected to NC-22 Tango
P-P interstage transformer which pushes the 845 P-P Class A
fix bias output stage. Output transformer is Tamura F-2021.
Power supply:
Power trans 1-Tamura STU-3012 (230V primary)
Power trans 2-Old Chikago transformers.
Tube rectifieeng- 2*5AR4 and 5U4(for driver stage)
Filtering-2* Tamura A-4004 chokes and oil capacitors for HT section and one A-4004 choke with oil caps for driver section.
The amplifier is developed by me without feedback.
The project proceeded one and a half year .
I am sorry for my English.
For each monoblock:
Input transformer-Tamura STU-001 300,150 Ohm to 100 kOhm
with CT are connected to Class A Push-Pull driver (two El34 in triode mode). The driver stage are connected to NC-22 Tango
P-P interstage transformer which pushes the 845 P-P Class A
fix bias output stage. Output transformer is Tamura F-2021.
Power supply:
Power trans 1-Tamura STU-3012 (230V primary)
Power trans 2-Old Chikago transformers.
Tube rectifieeng- 2*5AR4 and 5U4(for driver stage)
Filtering-2* Tamura A-4004 chokes and oil capacitors for HT section and one A-4004 choke with oil caps for driver section.
The amplifier is developed by me without feedback.
The project proceeded one and a half year .
I am sorry for my English.
Re: My 845.
Your English is at least as good as some of the English speaking members... and WAY better than my Hebrew
dave
845 said:I am sorry for my English.
Your English is at least as good as some of the English speaking members... and WAY better than my Hebrew
dave
Hi,
this is a tube pre amplifier based on a kit from Steinmusic from 1993 ... including phono stage. The upper cabinet is the pre itself, the one below contains the p/s. More info on my site
The cabinet is 5mm Aluminium coated with "stainless steel effect" laquer; the front graphics is printed on ordinary ink-jet paper behind 5mm clear PMMA. Knobs are cheap aluminium ones ($3 each)
Cheers
Christian.
this is a tube pre amplifier based on a kit from Steinmusic from 1993 ... including phono stage. The upper cabinet is the pre itself, the one below contains the p/s. More info on my site
The cabinet is 5mm Aluminium coated with "stainless steel effect" laquer; the front graphics is printed on ordinary ink-jet paper behind 5mm clear PMMA. Knobs are cheap aluminium ones ($3 each)
An externally hosted image should be here but it was not working when we last tested it.
Cheers
Christian.
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