Recent content by YamahaFreak

(I got a pop-up that informed me of another member having this exact issue with this exact amp in 2016, unresolved!) I picked up a 1984 Fisher CA-35 integrated amplifier at Goodwill yesterday...seemed to work well until I went to adjust the equalizer sliders. None of them except for the 4.5 kHz...

I realize I'm necroing a bit of an old thread here, but since I own the same set of speakers and have extensive personal history with them (and my old thread on this same issue was linked here) I figured I'd weigh in. I'm pretty firmly of the belief that dried out ferrofluid is indeed the...

I am attempting to refoam the woofers on my Mach Ones, but I've run into a problem - I cannot figure out how to safely remove the hard plastic trim rings on the woofer frames. They're glued down very firmly, and I'm not sure how to remove them. I've tried the heat gun...no dice, and I'm afraid...

I am familiar with the 22ES having rubber surrounds, as well as a couple other models. Yes, the 615s are probably late 80s or maybe even early 90s models, and are nowhere near the quality of the original APM designs. The woofer and presumably midrange have a conventional round voice coil and...

Hi all, I have recently become fascinated with Sony's curious APM square speaker driver technology, and managed to find two different pairs rather cheaply. As I understand it, there are a few distinct 'classes' of APM speakers, with the earlier ones being better quality (sonically and build...

I am very much enjoying the JVC JA-S22 amplifier I acquired in a trade earlier this year. After replacing a glass diode and the two meter lamps, it looks great! It's a bit beat up cosmetically and the volume knob isn't original (anyone know anyone with one?) but sounds amazing. I'm using it as a...

As stated earlier in thread, a battery-powered unit is just down the hall. Hmmm, seems the Americium going bad can't possibly be the cause...its half-life is well over 400 years! :D

Yes, this unit's detecting chamber contains three microcuries of Americium 241. I am well-versed in radioactive materials and know better than to attempt opening the chamber! I had briefly considered that maybe the half-life of the material had been reached, or it had deteriorated to the point...

Don't worry, there is a newer battery-powered unit just down the hall from this one. I'm asking about fixing this unit because it's an interesting antique. :P

Bottom of board

Top of board

Instructions inside front cover

Having to upload images one per post, as my iPhone apparently doesn't support multiple upload...sorry, guys! Also, they may be rotated incorrectly. Rear panel

I have been everywhere looking for answers to this issue and have found none. I have an old General Electric model 8202 smoke alarm. It came with the house, so probably built sometime in the late 70s or early 80s. It's an AC-powered unit with no batteries. Here's the deal: it randomly buzzes and...

I know I'm necro-ing this really old thread, but...I found an SA-310 myself today. Thrift store owner gave it to me, complaining of a 'burning smell' from within. I got it home and power tested it, and didn't notice any odor beyond that traditional 'warm and toasty' amplifier smell, haha. Using...