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hk citation 17 help

M

Mark.Cass

Member
dose anyone no the modern replacement transistors on the output amplifire board on the hk citation 17 part #s are 43025972 the transistor its self says m 452 25972 also the 4302772 which reads m 321 27722 they are in need of replacements any help would be greatly appreciated thanks mark
 
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This question would receive more responses in the "Solid State" forum. The "AK New Format" forum is for issues related to the latest AK format, not for repair related issues.
You should ask the moderators via the blue "Report" link under your post, left side, to move this thread to the "Solid State" forum instead where your question will have more visibility.
You should also check out the link below for information related to HK 17 upgrades. You may even find an answer to your question there.

AmCan

Thread 'Harman Kardon Citation 17 Upgrades'

This is my first thread and first DIY project. I bought a Harman Kardon 17/19 Combo for $500 and now I am going to completely upgrade the capacitors in the 17. In 1978 the Harman Kardon 17/19 combo was when Lee Kuby headed HK's CITATION Line and was working with Matti Ottala on improving intermodulated distortion. During the 1970’s Harman Kardon rivaled sales of McIntosh as some of the most expensive audio gear of its day.

Step One: Power Board. I am using Elna Silmic IIs for the higher Electrolytics and Mundorf ZNs for the perfect value match swap of .1uf. I will then be using Vishay...
 
Yes I have an oldfashioned plain HTML pages site, maybe you can access directly without clicking or just put my main page name in the browser. I do not have any certificates, nor forms nor any programming on my site. It seems it still works for most (maybe not if provided as a link?).

Anyway, for the output board a text copy: "The transistors used are: BC550C (Q1,2,9,10), BC547B (Q3,6,11,14), BC640 (Q4,12), BC557B(Q5,13), BC546B (Q7,15), BC560C (Q8,16)."
BTW the refurb was some 10 years ago, I forgot the reasoning for each specific transistor choice back then.
 
Last edited:
gslikker said:
Yes I have an oldfashioned plain HTML pages site, maybe you can access directly without clicking or just put my main page name in the browser. I do not have any certificates, nor forms nor any programming on my site. It seems it still works for most (maybe not if provided as a link?).
Click to expand...
I just wanted to make sure this was indeed your site, and not some hacker site attempting to steal information.
 
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