HiWatt High Gain 100 schematic???

[Bernardduur]

Hey all!

I just got this amp in as it popped a fuse.... need to check it but I would love to see something of a schematic. HiWatt does not deliver it to me......

Any ideas? Any schematics out there?

I traced a part..... maybe I should just finish it


Btw, these newer HiWatt amps; are they made by the same builder as those new Oranges? Exact same PCB and parts..... same lame sockets mounted to the board......

[Bernardduur]

OK, need to vent my frustration......

The preamp tubes run on 24V which is divided over 2 preamps tubes. The poweramp tubes have a dedicated voltage of 6.1V AC (w/ no load) but when loaded the unit quickly draws it down to 5.5V.......

Guess this could be a good reason why the amp is popping fuses...... I run it at 240V setting (no 220V setting)...... no other wiring on the unit, just 2 fuses for the heater lines.

Any ideas?

[Fragger]

MHuss Hiwatt Amplifier Pages - Tech Info
vintageHIWATTconvention.com • Index page

[Bernardduur]

Tnx!! I'll check the links!

[Flo]

A schematic of the 50W hi gain Hiwatt amp can be found here:
HIWATT HI-GAIN 50 COMBO SCH Service Manual free download, schematics, eeprom, repair info for electronics

I thought I post it here because I was looking for it and found this post without resolution.

[drewl]

Do we know who is making these now?

There were a few people making Hiwatts recently.

Just got a Royal made 50w clone in.
Looks like the Jimmy Page version.
I'll know tomorrow when I crack it open.

[g1]

The schematic for the high gain 50 says 'Changyu' so it appears they are chinese.