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Old 5th January 2013, 11:00 PM   #101
wally5 is offline wally5  New Zealand
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Quote:
Originally Posted by stenks View Post
Tried and tested Sulzer-Borbely Regulator Power supply, results are more than good no hum or noise perfectly stable, but I returned the original transformer is much more pleasant to listen to.

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Hi, Really great work, love the power supply, whats that other small PCB in power supply section. What does pre-amp sound like now, do you use your pre-amp to play a lot of LP's.
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Old 6th January 2013, 12:33 AM   #102
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Was that power supply board a home made board, or did you purchase it?
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Old 8th February 2013, 07:13 PM   #103
stenks is offline stenks  Serbia
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Quote:
Originally Posted by ouimetnick View Post
Was that power supply board a home made board, or did you purchase it?


To answer your question ouimetnick, PCB I've made ​​and constructed according to the appropriate size so that it can be placed into the housing HAFLER DH-101, I also listed several changes in the form of improved power supply. If anyone is interested I can send you the file and you can easily make (toner transfer) method. I just can say the power supply is working great and is very quiet. My HAFLER DH-200 power amplifier came from Ebay and I begin modifications on them, expecting some parts from Ebay (Power Supply cap, Power Switch, Polypropylene capacitor set ... etc.) for now replaced several components and is fully wired with "Van Den Hull CS18" wire and I can say sounds awesome.
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Old 8th February 2013, 07:53 PM   #104
stenks is offline stenks  Serbia
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Quote:
Originally Posted by wally5 View Post
Hi, Really great work, love the power supply, whats that other small PCB in power supply section. What does pre-amp sound like now, do you use your pre-amp to play a lot of LP's.
Hi Wally5 thank you, I finally found some time to answer some questions because it is difficult to align the time together with children, wife and job. If you are able to notice in the pictures I took out preamp coupling capacitors of 10uF because the CD player already have Black Gate capacitors at the entrance HAFLER DH-200 also so there is no need for them because they degrade the signal. All transistors are hfe matched so that the dc output to around 3-5mV and that is more than good. Results are immediately, wide stage, dynamics, and of course the magic hidden details, simply to try and see the difference. Even John Hillig of Musical Concept in his super mode HAFLER DH 101 recommend removing input capacitors from preamp, all that matters is that you are sure that the power amplifier input coupling capacitor exist.
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Old 1st March 2013, 03:26 AM   #105
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Default DH-101 Grounding mod from Audio Amateur years ago

Attached is the grounding mod for the DH-101 published in Audio Amateur many years ago. Somebody asked about it earlier and I don't think I ever saw it. My apologies if this has been put up elsewhere.
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File Type: gif DH101 grounding mod.gif (12.7 KB, 254 views)
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Old 1st March 2013, 06:51 AM   #106
stenks is offline stenks  Serbia
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Originally Posted by DarthBubba View Post
Attached is the grounding mod for the DH-101 published in Audio Amateur many years ago. Somebody asked about it earlier and I don't think I ever saw it. My apologies if this has been put up elsewhere.
Thanks, it is very useful.

Best regards
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Old 16th March 2013, 06:06 PM   #107
stenks is offline stenks  Serbia
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Default Hafler DH 101 preamplifire rebuild

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Old 16th March 2013, 06:12 PM   #108
stenks is offline stenks  Serbia
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Old 17th March 2013, 06:20 PM   #109
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[QUOTE=stenks;3413823]


Will you be offering this power supply board for sale? Both boards? Please! Click the image to open in full size.
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Old 28th October 2013, 01:57 AM   #110
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Default hafler pcb

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Originally Posted by stenks View Post
Made a new plexiglass carriers for the Gold-plated RCA connectors, the new quality PCB board, the wiring will be Van Den Hul CS-18, mains filter and torus transformer will be installed. After the completion of the modification will put new pictures.




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is possible to buy a pcb like these, because the original pcb died, thanks.
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