Help with hafler dh-101, please

laotzu61

i am in the process of taking apart my hafler preamp to clean the pots with deoxit. the volume and balance controls are retained with a threaded (i.d.) set-screw. what do i need/use to remove these so i can get the knobs off? thanks for any help.

[Deleted User]

Hello,
If I remember correctly those are hex-head set screws, but you might be able to spray the pots with just the top removed.
Regards, Ken

laotzu61

thanks for the response, kenneth. nope; these puppy's are threaded from the top down. hex head won't work. i have a feeling this may have been done specifically so you would need a tool from the mfg. or a tech. can't find anything thru an online search, either.

[Deleted User]

Hello,
I found the owner's manual for building the kit:
http://www.hafler.com/techsupport/pdf/DH-101_preamp_man.pdf
On page 19 instruction 121 says to use the supplied Allen wrench to tighten the set screws on all the knobs and balance control. Dave Hafler always used off-the-shelf parts and wouldn't have made anything require specific, hard to find tools. It's been a while since I built one of these, but unless someone has replaced the original knobs with something else an Allen wrench went into the holes on the bottom of each knob.
Regards, Ken

laotzu61

hey, kenneth; i did happen to find a REALLY small one and it worked. so does my balance control now after deoxit. thanks.

[Deleted User]

Very cool, it's always good to have balance in life.