Hi Robert, What I can do is take your corrections, alter the schematic posted, rescan it and repost in the same folder. I'll send you a preliminary copy that way you can check what I've done if that's

Robert, Ed, et al Below is the link to the updated A3MS schematic. I took Roberts comments and corrected the schematic, then compared it with the S3000 III tuner schematic and the SAM's Photofact A3MX

Hi all, OK time to thin the herd. The following tuners need to find a new home! All are untouched OEMs, cosmetically nice and clean. PM me off list for specifics and pictures. HK Citation 14 HK TU 915

Hi all, Anyone out there have a schematic or better yet a Service Manual they are willing to share for this puppy. Thanks, JohnC

Hi John, Ray Now Ray, apparently you've forgotten more than most of us know, but I'm tryin to catch up, with the memory loss that is. The knowledge, is a whole nother kettle of fish. The schematic is

Evenin everyone, Well, back from the Big Apple. Hope everyone had a great Thanksgiving, me aside from the obligatory Turkey, I bulked up on New York Pizza and a Pastrami on Rye big enough that it had

Hi Lee, Welcome to the group! You have a very nice tuner to mod there. To answer your questions: 1 - Yes the 11DQ10 diodes work fine in the 7500, use PN 844-11DQ10 from Mouser, the TRs are not stocked

Hi Lee, The short answer is YES, you may want to look at the thread starting here: Transformer Isolation There's even a picture of a KT 815 towards the end. Regards JohnC

Hi Bob, Mark, I have the AH180 SM, the complete 673 SM is posted over in the Tuner Information Center linked from the tuner description. Here: AH673 Service Manual If I can get a readable scan of a co

Hi RC, There's a web site here: LM 4500 MPX but in essence you're communicating with BobF. He designed, had the boards made, and put together the parts list. The web site has all the info. Regards Joh

Hi Kamen, The initial paragraphs of the Shootout establish the condition of the tuners. The following is a condensed version, basically the tuners are functioning correctly but "As Found": " A -C- app

Hi Lee You will find the schematic and a picture of the regulator attached. Disregard the resistor notation on the schematic, (courtesy RFM) its for the 815. The correct information for the 7500 is to

Hi Lee, Since you've limited the supplier to Mouser, its' pretty much excluded the boutique caps like AuriCap, Sonicap et al. Discussing which cap is "better" usually ends in flames so in order to at

Hi John, Yea, but after they are cryogenically treated, thawed using only UltraViolet radiation, then aged for exactly 256 days in pickle brine maintained at exactly 362 degrees K they're passable. Re

Hi Jeff, Here's something to ponder, first the premise, in my experience both the K40s & MBMs seem to be very refined, sound great,better than most, at the frequency extremes of the audible spectrum a

I've used the K40s myself and they're great. The caveat being, do you have the room & can you isolate the cap case from shorting out something else. If memory serves they were used in the TU 9900 mods

Hi doug, The 14 & 15 really are twins, not identical but fraternal, twins none the less. Take a 15 and add a 5 gang front end, potted transformer and dedicated Dolby board and you're 95 if not 100% th

Hi JC, Good catch, noticed it myself earlier and sent the seller a question regarding the mismatch and the tuning & sig Strength LEDs are not lit. No response as of yet. Regards JohnC

Hi Folks, The 760 has 3 small fuses accessed through a panel in the bottom of the tuner. There is a 100 mA fuse in there that controls the tuning functions and when it blows the tuner won't tune but e

Hi Marc, I've had more than a few of these apart and the problem appears to be the main shaft on the tuning knob. The shaft does not run in bearings like on most other tuners. Its a steel shaft suppor