HK Hot Rod nears restoration completion
- Thread starter audiodon
- Start date
jaymanaa
RIP 1961-2018
Sounds like you hit a home run.:thmbsp: Did you see this deal when I posted it a couple weeks ago? http://www.webervst.com/tubes1/calcbias.htm
thedelihaus
Nocturnal transmissions
The Renaissance Preludes don alludes to are mine.
This integrated amplifier of his gave up nothing in bass performance to my 200+wpc B&K EX-442 "Sonata" series.
And midrange and overall top to bottom smoothness was dramatically improved over what is already a very high end smooth and warm SS amp.
AudioDon is a maestro.
This integrated amplifier of his gave up nothing in bass performance to my 200+wpc B&K EX-442 "Sonata" series.
And midrange and overall top to bottom smoothness was dramatically improved over what is already a very high end smooth and warm SS amp.
AudioDon is a maestro.
Hi Don, I just discovered this Chorale thread and enjoyed your
Comprehensive restoration chronicling.
My stock Chorale amp was restored by Bill Bittle of archeangele sound about 8 years ago.
I can affirm that this is one fine and detailed amp. I also prefer the tone defeat option.
Thanks for this thread !
Comprehensive restoration chronicling.
My stock Chorale amp was restored by Bill Bittle of archeangele sound about 8 years ago.
I can affirm that this is one fine and detailed amp. I also prefer the tone defeat option.
Thanks for this thread !
audiodon
Addicted Member
Thanks Sonytubes.
When it has been played regularly since new, or has been fully restored, it's a great piece.
I'd rather not have had to change every resistor, but this one sat for years, and possibly decades, unplayed, and the resistors were way off. Regular use by two previous owners (the first said it was a trash find) and playing it for a couple of days continuously didn't change that.
When it has been played regularly since new, or has been fully restored, it's a great piece.
I'd rather not have had to change every resistor, but this one sat for years, and possibly decades, unplayed, and the resistors were way off. Regular use by two previous owners (the first said it was a trash find) and playing it for a couple of days continuously didn't change that.
Don, this really was a masterpiece of restoration work. I'd also comment on your choice of putting all the effort into such a 'worthy' piece! I'd LOVE to hear it some time....but not sure when my next trip 'up North' will be.........lol. That said, I think a pilgrimage to the Boston Harbor should be on my Bucket List some place! BTW, I finished up the ST-70 I was working on, just now 'completed' the 299B that has been plaguing me for a while.....and I'm about to get back into the KX200. So, again, I thank you so much for your help there! If you could see this thing you'd probably ask me why I'm going to put in the effort. But, I think you and I share a fondness for 7591 amps......and I don't have a Fisher Integrated in that category.....until I finish this relic! So...wish me luck. And again, I can't compliment you enough of the job you did with the HK! FINE workmanship! Tom D.
audiodon
Addicted Member
Thanks Wharfcreek.
If you look at the dcgillespie thread on his X-202-B restore, there's some stuff that will apply to your KX-200. It covers Jaymanaa's favorite Fisher gripe . . . getting rid of the center channel circuitry, as well as how to bypass the tone controls (passive in the KX-200 though active in the X-202-B).
The thing is, the KX-200 uses the X-202-B iron and can not only be restored, but can be brought up so it punches far above its weight.
If you look at the dcgillespie thread on his X-202-B restore, there's some stuff that will apply to your KX-200. It covers Jaymanaa's favorite Fisher gripe . . . getting rid of the center channel circuitry, as well as how to bypass the tone controls (passive in the KX-200 though active in the X-202-B).
The thing is, the KX-200 uses the X-202-B iron and can not only be restored, but can be brought up so it punches far above its weight.
Don,
Here's a thought: How would one perhaps 'sacrifice' the Phono section to maybe 'add' the capacity of 'active' tone controls on the KX200........ (QM). I've now acquired a couple of fairly nice 'outboard' phono stage pre-amps. So, in my case, I really have no need for the phono stage in an amp, although I do use it. But, to make the tone controls 'active', I'd gladly give up the phono section.
I have a feeling that the answer to this is to simply rebuild the amp as a X-202 less the phono section. I typically LIKE tone controls....whereas I'm well aware that there is a segment of the audio population that campaigns against them. But, one distinct difference between a lot of the Scott and Fisher units is the tone controls.....being 'active' on most all Scotts that I'm aware of......and 'passive' on most all the the higher end Fishers. It would be quite a project to make this change.....but perhaps quite rewarding as well. Depending on whether or not I can restore the amp to 'stock', I may consider that option.
I have a somewhat similar project that I've 'prepped' for but not yet completed: I now have the, I believe, PC-6....the 'tone board' from a Dynaco PAS-2-3 pre-amp. And, I finally came up with a 'mule' SCA-35. Like the above, I've been looking at the idea of pulling the phono pre-amp stage out of an SCA-35 and replacing it with the tone board from a PAS pre-amp. I would then also remove the two 'amp' boards from the SCA....which are designed to work with the passive controls of the 'stock' SCA, and replace them with amp boards from an ST-35. This, in effect, would be the equivalent of having a PAS pre-amp and an ST-35 power amp...but all 'integrated' into the SCA chassis platform.
I don't know if the latter idea is 'viable' or not.....as I'm not sure that the physical limitations of the SCA chassis will prohibit the modification to the installation of the PAS board. But.......seems worth a try!
Anyway.......I'll take a look at DCG's thread on the X-202 and see what I can learn from it. Right now it's off to Bass Pro for some 2-cycle oil and fishing gear!
Thanks Don! Tom D.
Here's a thought: How would one perhaps 'sacrifice' the Phono section to maybe 'add' the capacity of 'active' tone controls on the KX200........ (QM). I've now acquired a couple of fairly nice 'outboard' phono stage pre-amps. So, in my case, I really have no need for the phono stage in an amp, although I do use it. But, to make the tone controls 'active', I'd gladly give up the phono section.
I have a feeling that the answer to this is to simply rebuild the amp as a X-202 less the phono section. I typically LIKE tone controls....whereas I'm well aware that there is a segment of the audio population that campaigns against them. But, one distinct difference between a lot of the Scott and Fisher units is the tone controls.....being 'active' on most all Scotts that I'm aware of......and 'passive' on most all the the higher end Fishers. It would be quite a project to make this change.....but perhaps quite rewarding as well. Depending on whether or not I can restore the amp to 'stock', I may consider that option.
I have a somewhat similar project that I've 'prepped' for but not yet completed: I now have the, I believe, PC-6....the 'tone board' from a Dynaco PAS-2-3 pre-amp. And, I finally came up with a 'mule' SCA-35. Like the above, I've been looking at the idea of pulling the phono pre-amp stage out of an SCA-35 and replacing it with the tone board from a PAS pre-amp. I would then also remove the two 'amp' boards from the SCA....which are designed to work with the passive controls of the 'stock' SCA, and replace them with amp boards from an ST-35. This, in effect, would be the equivalent of having a PAS pre-amp and an ST-35 power amp...but all 'integrated' into the SCA chassis platform.
I don't know if the latter idea is 'viable' or not.....as I'm not sure that the physical limitations of the SCA chassis will prohibit the modification to the installation of the PAS board. But.......seems worth a try!
Anyway.......I'll take a look at DCG's thread on the X-202 and see what I can learn from it. Right now it's off to Bass Pro for some 2-cycle oil and fishing gear!
Thanks Don! Tom D.