seti Posted January 18, 2023 Share Posted January 18, 2023 Finally 99.6% completed. There are only two things I would change so not too bad. This was a hard learning experience and I will never build exactly like this again 8-) Here is the recap. Built this mono tube amplifier for the Klipsch Museum with the much help from Chris Hornbeck and Intact Audio. It was a found schematic from the Klipsch archives for the #1 Klipschorn from 1945/46. It is a push pull triode 5 watt amp with built in electronic crossover. It is made specifically for the first klipschorn. The first khorn bass horn featured a Jensen A12PM and the HF a prototype horn with a Western Electric 555… Amazing. This is a gift it to the #1 Khorn and Klipsch Museum for PWK's birthday in March so maybe next years birthday we will be able to listen to the #1 khorn as they did at a party to celebrate the end of WW2. Not sure how long this build took but it was worth it. BTW it is a 5wpc and it does go to 11 as did the orginal in 1945/46… Dave Slagle of Intact Audio studied PWK's electronic crossover design and donated all the transformers. The top plate and front plate are from Front Panel Express. Jim Hunter found the an early PWK signature and Matt Sommers made that into a logo. We still have some final adjustments and some testing to do but it is largely done. I love the old HAM chassis and buy them as I see them. A great way to wrap up a project. It is DIY so it ain't perfect. Hope @Chief bonehead approves 8-) Early in the testing process. 10 6 Quote Link to comment Share on other sites More sharing options...
henry4841 Posted January 18, 2023 Share Posted January 18, 2023 Really nice and cool looking. I would be proud as I am sure you are. Five watts are all that is needed with our speakers. Quote Link to comment Share on other sites More sharing options...
The Dude Posted January 18, 2023 Share Posted January 18, 2023 Nicely done, I would love to hear this. Quote Link to comment Share on other sites More sharing options...
seti Posted January 18, 2023 Author Share Posted January 18, 2023 1 hour ago, henry4841 said: Really nice and cool looking. I would be proud as I am sure you are. Five watts are all that is needed with our speakers. This amplifier will only work on the #1 Klipschorn in the museum WE555 on the HF and the first khorn sported a Jensen A12PM in the LF. PWK designed the electronic crossover for this speaker specifically.... 3 Quote Link to comment Share on other sites More sharing options...
OO1 Posted January 18, 2023 Share Posted January 18, 2023 2 hours ago, seti said: Finally 99.6% completed. the Large Variac Knob is a really cool feature . Quote Link to comment Share on other sites More sharing options...
seti Posted January 18, 2023 Author Share Posted January 18, 2023 1 minute ago, OO1 said: the Large Variac Knob is a really cool feature . It functions as On / Off and Gain control. 1 Quote Link to comment Share on other sites More sharing options...
mark1101 Posted January 18, 2023 Share Posted January 18, 2023 Wow, this is incredible that you were able to figure this out and build it. I would love to hear how it works on the #1 Khorn someday. Congrats on a very special project. 👍 2 Quote Link to comment Share on other sites More sharing options...
mikebse2a3 Posted January 18, 2023 Share Posted January 18, 2023 Awesome achievement…!!! Thanks to everyone who played a part in this project 👍🙂 miketn 2 Quote Link to comment Share on other sites More sharing options...
seti Posted January 19, 2023 Author Share Posted January 19, 2023 Thanks guys. I love the look and am going to use it on my next projects. I have 5 or 6 of these ham chassis. Can't wait to do the big one. 2 1 Quote Link to comment Share on other sites More sharing options...
CWelsh Posted January 21, 2023 Share Posted January 21, 2023 What a cool project! Can't wait to see what you come up with for further projects. 1 Quote Link to comment Share on other sites More sharing options...
M_Klipsches Posted January 22, 2023 Share Posted January 22, 2023 That looks fantastic. Looking forward to seeing others built in this style. 2 Quote Link to comment Share on other sites More sharing options...
sunnysal Posted January 23, 2023 Share Posted January 23, 2023 It's what the world needs! Is there a schematic we can review for kicks? I wonder how it compares to the Brooks? Quote Link to comment Share on other sites More sharing options...
henry4841 Posted January 24, 2023 Share Posted January 24, 2023 I also would love to see schematic. Quote Link to comment Share on other sites More sharing options...
Marvel Posted January 24, 2023 Share Posted January 24, 2023 21 hours ago, sunnysal said: It's what the world needs! Is there a schematic we can review for kicks? I wonder how it compares to the Brooks? I think it's in the 5th pic Ian posted. 1 Quote Link to comment Share on other sites More sharing options...
henry4841 Posted January 24, 2023 Share Posted January 24, 2023 1 hour ago, Marvel said: I think it's in the 5th pic Ian posted. I kind'a see it. Quote Link to comment Share on other sites More sharing options...
seti Posted January 25, 2023 Author Share Posted January 25, 2023 This is the article that started it all. Thanks to Jim Hunter. Then there was this PWK schematic that was related to the article. It isn't secret it iwas wall art at Klipsch in Hope. We were the first to build it 8-) since PWK in 1946. My friend Chris made some minor changes here and there. PWK's electronic crossover and this schematic is what we did. You could do similar with traditional outputs. Ain't nuthin stopping ya 8-) It could easily be a 2A3 version..Since there was no power supply we went overboard. This was on the wall at the museum... Been looking at it for years. 3 Quote Link to comment Share on other sites More sharing options...
henry4841 Posted January 25, 2023 Share Posted January 25, 2023 9 hours ago, seti said: This is the article that started it all. Thanks to Jim Hunter. Then there was this PWK schematic that was related to the article. It isn't secret it iwas wall art at Klipsch in Hope. We were the first to build it 8-) since PWK in 1946. My friend Chris made some minor changes here and there. PWK's electronic crossover and this schematic is what we did. You could do similar with traditional outputs. Ain't nuthin stopping ya 8-) It could easily be a 2A3 version..Since there was no power supply we went overboard. This was on the wall at the museum... Been looking at it for years. I like this kind of stuff, thanks. Quote Link to comment Share on other sites More sharing options...
Dave1291 Posted January 26, 2023 Share Posted January 26, 2023 Thanks for all of the time, money and love that went into that build. I'll give you a bye on that .04% for sure. Again, thank you. Mission Accomplished 1 Quote Link to comment Share on other sites More sharing options...
rigma Posted January 26, 2023 Share Posted January 26, 2023 Great job Seti! 1 1 Quote Link to comment Share on other sites More sharing options...
seti Posted January 26, 2023 Author Share Posted January 26, 2023 4 hours ago, rigma said: Great job Seti! You were the first to encourage me to go the DIY route... Thanks 8-) 1 Quote Link to comment Share on other sites More sharing options...
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