For Sale Hitachi based monoblocks

[TheFinisher]

I absolutely have to thin out my gear and these are the first up .

Lovely sounding amps and they’ve been 100% reliable

£300 and collection in Person ( absolutely no couriers ) from Buckinghamshire

 

[Mobes123]

These look nice. Could you share some details of the design?

 

[RM]

Hitachi app note, made by Pantechnic / J. W. Rimmer. Those H-Paks, like Sanken MT-200, are like all transistors should have been made.

R

 

[TheFinisher]

Sold

 

[TheFinisher]

These look nice. Could you share some details of the design?

I’ve not got a clue I’m afraid. Not my build

 

[thermionic]

I'd be very surprised if this amp differs in any considerable way from the famous Maplin Hitachi design, which has a long thread here:

Thread 'Maplin MosFET Amplifier GA28F construction thread'

2014-06-08 11:03 pm

Hi

Please find a few pics of my new Maplin 100w Mosfet amplifier construction thread .. All parts are new old stock with original transistors, but all capacitors are new, just a little bit of nostalgia from the past !!

Both amps will be mono blocks ..

best regards Nick

• jamesfeline
• Replies: 387
• Forum: Solid State

• 

Check the AP plot that I posted for its performance. This was for a module that I dug out of storage, which hadn't been honed. I have tested the Hitachi 7500 amp and seen THD below -100dBV into a 4r7 load (this was after a service and I biased it using an FFT analyser).

Nigel Wright sells a PCB of this amp if you want one. Low parts count, but high performance and ruggedness. A true classic.