You know, Tony. In the two years or more that I’ve been watching KZitem videos on electronics, yours and others, this is the fist time I can remember someone injecting a signal to troubleshoot a circuit. I’ve learned a lot from this (older) series. I like a lot of the aspects of the Harmon Kardon design, but the ‘build quality’ is killing my enthusiasm. I really admire your persistence; I’m sure a professional, for whom time is money, might refuse the work, or quit once the investment exceeded the unit’s value. I’m like you, I’ll follow a problem to the bitter end. I don’t much money for my effort, but I reap a great deal of satisfaction. 🙂🙂🙂🙂🙂
@electronicengineer
3 жыл бұрын
One of the main reasons I love your KZitem channel Tony is because you include your mistakes (which we all fall victim to, including myself). Thank You for your candor in sharing your adventures with us. Now that I am on the topic of xraytonyb, you have become my favorite vintage audio gear restoration channel on KZitem. Thank You Tony for continuing to show us "real life" problems and your excellent troubleshooting skills, as we watch you work through them. I firmly believe that we learn the most from our errors. Awesome video and as always sir, Awesome work Tony! Fred
@2flyabove
3 жыл бұрын
That was a challenging restoration. I'm impressed with your detective work and repair skills.
@1959Berre
3 жыл бұрын
I learned to inspect re-flowed solder joints with a magnifying glass. It has saved me a lot of time on several occasions.
@jdmccorful
3 жыл бұрын
The proofs in the pudding, and you've got the right recipe! Excellent retracing steps through your sleuthing.Thanks for the "path".
@Digital-Dan
3 жыл бұрын
Reminded of the old Danny Kaye Movie, The Court Jester: The chalice with the palace has the pellets that are poison, while the flagon with the dragon has the brew that is true.
@PossibleAudio
14 күн бұрын
Thank you for showing me all of the reasons I should never let one of these in my house.
@diabolicalartificer
3 жыл бұрын
A grand "how to" fault finding video, thanks, I learned something there.....DA.
@alexw890
7 ай бұрын
Wow what a series! I’ll stick the the earlier HK’s, this thing is a PITA.
@karmajoyst
3 жыл бұрын
Learn stuff from your channel with every video you publish. Given the semi-lock down/working from home situation the last 13 months I found out that I got interested in vintage amplifiers and then that I wanted to take on the challenge of repairing and restoring broken ones. Can honestly say that your explanations and structured way of doing troubleshooting and telling about experiences has made me not to fear even when I know I don’t grasp everything about it when it comes to all this amplifier goodness.
@mackfisher4487
3 жыл бұрын
I like your troubleshooting philosophy
@mwilsonojai
3 жыл бұрын
i have a pioneer sx-750 that i want to be restored recapped and whatever else it needs but its hard to find someone like you to do it. maybe you can do a short video on what us rookies need to know when hiring someone to do the work. questions to ask you know what i mean thank you.
@jeremiahchamberlin4499
7 ай бұрын
Great video series, but it is also provides a basic argument in favor of building a system from a collection of separates; each box dedicated to a single function.
@seanobrien7169
3 жыл бұрын
I'm just a love machine ripoff. How does that not cause a hit? GREAT VIDEO! Yes, practical troubleshooting. It is funny because the whole time my gut was saying bad solder joint somewhere.
@afzaalkhan.m
2 жыл бұрын
Thank you for a very informative diagnosis.
@andymouse
3 жыл бұрын
Thoroughly enjoyed this !...cheers.
@gime3steps
3 жыл бұрын
Nice work!! Fun to watch the troubleshooting technique.
@paulpaulzadeh6172
3 жыл бұрын
Tony , wonderful , I like it but I must tell you I get sad when it come to end you fix it all , I hope it hade more fault so we can watch part 10 too .
@buildstoys
3 жыл бұрын
Coming along nicely Tony!
@gearheadted9210
3 жыл бұрын
electron ninja man!
@ronbradshaw7404
3 жыл бұрын
Gimme the 70"s build quality over the 80's anyday!.
@mikepxg6406
3 жыл бұрын
British made 80s hifi is in different league. you won’t find a tone control on cyrus or naim amps
@jimomertz
3 жыл бұрын
There’s that word! Janky. At 23:22. I just learned that one a couple of weeks ago. Now I’m calling everything janky 😄
@srtamplification
3 жыл бұрын
Great video Tony!!!
@jeffadams5510
3 жыл бұрын
Going through this exact same issue on a NAD receiver faceplate I reflowed. Worked before I started........smh
@PeterMilanovski
3 жыл бұрын
Just goes to prove that the journey is always better than the destination... Unless you are referring to all the work that was put into getting that cute little blonde back in 1978!!!! Well that's a different story for another day LoL 😂... But generally the rule holds true..
@DAVIDGREGORYKERR
3 жыл бұрын
I was thinking that in new DSP based integrated HIFI amplifiers everything is done through selecting which dual channel ADC is selected then through the DSP processing processors then dumping the processed signal to the PWM output stage
@keybutnolock
3 жыл бұрын
Roundabout - Yes....... utube safe ! Does "right to repair" affect you, work & play ? sorry, short question with long answer maybe. Thanks for sharing.
@vintagestereocollector4159
3 жыл бұрын
It’s time for MARANTZ hehehe
@andymouse
3 жыл бұрын
When you started injecting a signal you said " relatively low amplitude" about 300mV maybe please ?...cheers
@jimomertz
3 жыл бұрын
Did you test that capacitive loading switch on the phono? Is it as simple as measuring the capacitance between the positive and negative of each channel?
@bobdoritique7347
3 жыл бұрын
Merci for this video. What is your audio generator please?
@jonathanhendry9759
3 жыл бұрын
How do you know where you can safely inject a signal, and where you can't?
@mikepxg6406
3 жыл бұрын
looks like an amp to avoid. all these convoluted signal paths must severely effect sound quality.
@frankgeeraerts6243
Жыл бұрын
I bought that amp long ago and I resold it within a month !
@FB-lr4ep
2 жыл бұрын
Is this amp still up for sale?
@xraytonyb
2 жыл бұрын
It went back with the owner. Not sure what he did with it.
@johnnytoobad7785
3 жыл бұрын
Funny ...If you started to diagnose the circuit from the front-end (switch) instead of the back-end (riaa amp) you would have found the problem child sooner. I always suspect those those cheap tiny switches. In this case it wasn't even the switch but the hacked up solder-job that someone left there.
@xraytonyb
3 жыл бұрын
More likely, if I had started at the front-end, then the problem would have been somewhere else. Murphy's law ;)
@johnnytoobad7785
3 жыл бұрын
@@xraytonyb You are correct sir. Been down that road enough times..yes sir.
@moodyga40
3 жыл бұрын
these amps were plagued with dry joints bad condenser i wont even take these amps in for service or any HK of this era
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