New 30W Valve Monoblock Project.
- SteveTheShadow
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New 30W Valve Monoblock Project.
I have a new valve monoblock push-pull pentode project ready to roll.
Two mono block cases and a passive control unit, incorporating a Khozmo stepped attenuator
and a pair of Sowter phase-splitting transformers, which will feed a balanced signal to
the power amps.
Cases are steel, powder-coated in metallic grey.
Once all the transformers and chokes arrive, their end-bells will also go for powder-coating.
I'll detail the build as it progresses.
Two mono block cases and a passive control unit, incorporating a Khozmo stepped attenuator
and a pair of Sowter phase-splitting transformers, which will feed a balanced signal to
the power amps.
Cases are steel, powder-coated in metallic grey.
Once all the transformers and chokes arrive, their end-bells will also go for powder-coating.
I'll detail the build as it progresses.
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
- slinger
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Re: New 30W Valve Monoblock Project.
Now that's what I call a PROPER jigsaw puzzle.
Amps - NVA P50, AP30, A40, Stanislav Palo Tube Headphone Amp BB 85
Speakers - Monitor Audio Silver RX2
Cables - NVA LS1+LS3, SSC, Gotham S/PDIF, IBRA Optical
Digital - NAD C516BEE, SONY ST-SDB900 DAB TUNER, TEAC UD-H01 DAC
Analogue - Pro-Ject Debut Carbon Esprit SB, Graham Slee Gram Amp 2 Phono
Cans - Grado SR80, ATH-M50X
Speakers - Monitor Audio Silver RX2
Cables - NVA LS1+LS3, SSC, Gotham S/PDIF, IBRA Optical
Digital - NAD C516BEE, SONY ST-SDB900 DAB TUNER, TEAC UD-H01 DAC
Analogue - Pro-Ject Debut Carbon Esprit SB, Graham Slee Gram Amp 2 Phono
Cans - Grado SR80, ATH-M50X
- SteveTheShadow
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Re: New 30W Valve Monoblock Project.
Cases have been given oiled walnut front and rear panels:
Next job is to sully the pristine top plates, with a load of bulky heavy transformers and sockets for nasty high voltage
hot glass devices, but that is for another time.
Next job is to sully the pristine top plates, with a load of bulky heavy transformers and sockets for nasty high voltage
hot glass devices, but that is for another time.
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
- Fretless
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Re: New 30W Valve Monoblock Project.
Looking good, Steve
That plastic sunflower gives 'em a nice rustic touch
That plastic sunflower gives 'em a nice rustic touch
Upstairs:
VinylPro-Ject 1.2 + Grado Sig Jr + Cambridge Alva Duo
DigiVolumio PC + Kiss DP-500 + Sabaj A20d
NVA: Cube2 - SSP - LS6+ Sabaj A10a {x2)
Little Bear MC2 + AQ NightHawk
Downstairs:
VinylLogic DM101 + Syrinx LE1 + Grado Sig MCX
DigiDenafrips Ares II + Volumio PC + Cambridge CXC
NVA: P50 & PSU - BMUAiyima A07 MAX + Arcam One
HP: Allo DigiOne + Sabaj A10d + AQ NightOwl
Office: Allo DigiOne SIG + SMSL M300se + Douk G4 (x2)
Mission 760 + Monolith 887 + German Maestro GMP 450
- SteveTheShadow
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Re: New 30W Valve Monoblock Project.
Have got both chassis' marked out :
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
- SteveTheShadow
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Re: New 30W Valve Monoblock Project.
Here's a rough idea of the mirror image layout of the monoblocks:
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
- SteveTheShadow
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Re: New 30W Valve Monoblock Project.
Chassis' are now punched, drilled and grommeted:
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
- Colin Wonfor
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- SteveTheShadow
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Re: New 30W Valve Monoblock Project.
Thanks Colin.
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
- SteveTheShadow
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Re: New 30W Valve Monoblock Project.
OK...
All the external hardware is now mounted.
I've stuck some valves in to give an idea of the looks.
Valve between the 2xKT88 is the output stage screen grid voltage regulator.
EL34 will be used as the output stage in the final amp.
Valve at dead centre is an E182CC cathode follower that drives the output stage.
Two front valves are Brimar 6BS7 input pentodes.
The pot is an adjuster to set up the two input pentodes so that their screen grid currents can be
balanced. This brings their static operating characteristics into line with each other.
All the external hardware is now mounted.
I've stuck some valves in to give an idea of the looks.
Valve between the 2xKT88 is the output stage screen grid voltage regulator.
EL34 will be used as the output stage in the final amp.
Valve at dead centre is an E182CC cathode follower that drives the output stage.
Two front valves are Brimar 6BS7 input pentodes.
The pot is an adjuster to set up the two input pentodes so that their screen grid currents can be
balanced. This brings their static operating characteristics into line with each other.
Somebody’s telling me the latest scandals.
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)
Somebody’s stepping on my plastic sandals. Joe Jackson (1979)