Recent content by AmCan

Can someone please re-post the schematic diagram that use to be in post number 22? or at least can someone tell me the values of the inductors, resistors, and capacitors?

Hey guys, I thought I could get the right help posting this quick question here. When measuring the bias the manual says to measure between Q418 & Q420 collectors. I assume this means that I can place my leads on opposite ends of one of emitter resistors (r432 or r434)? Is that correct? If...

Hey, I am rebuilding my Seeburg crossovers and keeping the original 806 and Utah drivers. I am a little confused about this statement on how to modify the crossover to account for the 16ohm Altec 806 driver vs the 8ohm Selenium. The crossover diagram is in post number 22. Whaleman...

I upgraded the power supply but left the regulators on the driver boards alone because they are obsolete parts for the most part and are difficult to find and replace. In the end I upgraded the bridge rectifiers to Fairchild discrete diodes and also the first pair of JFets in order to bring the...

Hi - Actually put the heatsink back on and you access the resistor from the top. Then the other lead goes on the other side of the resistor. When I first looked at your picture my orientation was wrong but from looking at the top of the heatsink down then the top lead would have been right. I...

I have had the 11 and 17 and the 17 is a bit better in terms of noise floor. I find the 11 to have a bit more treble harshness. I see the 17s come up at least a few times a year on E-Bay. You just need to keep a saved search on Harman Kardon Citation and you will be notified when one comes up...

These amps will never get the respect they deserve because they don't have aqua blue lights; the true measure of hi-fidelity. :puke2:

No I think he needs to know what transistor to use for Q4 on the output board. I forgot to look last night.

I have that part number at home. If Bo doesn't answer you by then I'll have to get back to you later. I think its a TO-92 type but will verify when I get home from work.

After my friend recapped his 810s a mid-dome cut out on him completely only to find out the internal wire connecting the driver to the crossover network came off. If its cutting in and out its most likely a failing capacitor after 34 years. Either way those 710s are due for a recap.

Sorry for the delayed response I have been on vacation. I have completed the upgrades on the 19 for several months now but haven't reported back because I got sidetracked with my speaker project. The amp took about 40 hours to break in, which I suspect was the Vitamin Qs. The amp sounded...

Do whatever floats your boat. I tore the original grills off my Brauns much to the dismay of some purists but now I have a speaker I like to look at. You are the one who is going to listen to it so you should enjoy it.:music:

The cloth was most likely acoustically transparent cloth intended to hide the drivers, which some people consider ugly to look at. The grate is most likely there to protect the drivers from damage. Some people feel that cloth and gates can interfere with sound reproduction while others feel it...

Hey Jason, I just learned that since I adding more bracing to the cabinet on my Braun L-910s that the stuffing then over damped the woofer output. Bracing is a good substitute for damping but using both can be detrimental. You may want to try removing some of the stuffing to restore bass...