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Peak-reading meters show program peaks. Averaging meters show an average level of the program dynamics. If you are measuring test tone there are no dynamics to average…it’s a constant non-complex source whether at the input or from a test tape, so both meter types are going to reflect the same...

Yeah there’s nothing wrong with the 424/464 transport at all…similar to the 488, 644 and 688 too. That’s the thing…there are a LOT of them out there. So it’s not a challenge to find spares if absolutely necessary. And while the gears raise an eyebrow, I do like it better than a belt. And the...

If you connect a line level source like a CD player, mobile phone, synthesizer, etc to the RCV jack do you get good signal? Just keep in mind you are working on a relatively obscure console that appears to have modifications, and nobody in the conversation has any technical documentation...

I think I used hemostats, Daniel…and the key was sliding it in whatever direction got me closest to the plate clearing one of the pins, and then using the tool in the middle of the plate (maybe I used a spudger?) to bow it up and help provide the last little bit of clearance. I was thinking the...

Hey, Daniel! IIRC…and I wish I had one here to verify…but you should be able to slide that spring plate *upward* away from the head base assembly so the forked end can clear the lower pin, and then you’ll be able to slide it back down toward the head base to clear the top pin through opening in...

You’ll have to test it out. Looks like somebody possible replaced the RCA jacks with 1/4” jacks. If the jacks do not have normalling contacts that connect the signal conductor at the SEND jack to the signal conductor at the RCV jack when nothing is plugged in, then I suspect you need a jumper...

I recommend you pay the price to get the manual. I know of no Model 10 documentation available online, and I’m pretty resourceful in this area. And I e not seen an OEM manual come up for sale before. This is a rare chance. If you are committed to the console I would not pass up the opportunity...

Same one I linked in post #10 I believe…also with strong encouragement to the OP to grab it if they didn’t already have the manual.

I’ll repeat an unaddressed point/question I’ve raised more than once so far: do you have the service manual? You’re having multiple signal flow issues with a console that has very poor user community support, because A. there aren’t a lot in use these days and B. they are not popular. I hope...

Step 1 is to replace the plug-in relays on the transport control box. IIRC there are four of them…standard “ice cube” relays. Replace all of them with new. This will save yourself a mad amount of chasing your tail.

I never had an A-3440. I referred to a 3340S.

Noise: don’t assume it’s a design issue. The A-3440 is many years older than the 34B…have either been recapped? My hunch is a power supply recap would help in either case, and the A-3440 may be in a worse state. Both units feature audio power supplies with discrete regulation adequate global and...

I can’t say for sure…both machines use the 4558 and 4559 opamp…what I’ve learned from experience is the playback amp plays a key role in the sound of a machine, and what I do see on a somewhat macro level that’s different between the two is on the 34 the playback signal goes through a signal...

A couple other points about the M-2600…plenty of AUX busses with some flexibility in signal path source points…8 mono/stereo returns in the master section with great routing flexibility…great for monitoring or sourcing of effects returns, playback devices, etc…and a completely independent stereo...

I’ve owned an AG-440B-8, AG-440B-1, AG-440C-4, and currently own an MM-1000, which uses what is essentially AG-440B signal electronics (you called them “preamps”, but they are not preamplifiers…they are strictly line amplifiers…there is a plug-in transformer that allow them to source mic-level...

The EQ on the Model 10 has much more simple architecture…the switchable frequency points are limiting, but also can help avoid non-linear anomalies or phase distortions that swept type EQ filters, especially in budget products, often include. So it might work better for you. For a lot of other...

I would have to agree with RRuskin. The Model 10 feels more “serious” in its construction because it’s 20 years older than your M-2600, and was modeled after other consoles at the time…that’s 20 years worth of “value-engineering” reversed…but the Model 10 wasn’t nearly as robust as period...

To the OP, please, please don’t take my feedback/opinions/words as discouragement or shaming or anything. You have the console and it’s worth getting it working. I’ve never found online versions of the manual and tech docs. I strongly encourage you to grab this: https://ebay.us/m/LSXpzP It’s...

I only have the brochure…no manual. What can tell from pics online is it is all discrete solid state opamp based (so no chips, but discrete opamps). I wish I had schematics. The mic amp is unbalanced…no transformer or anything. It is vintage budget. The linear faders were a relatively rare...

Could it have been a little later than that? The Model 10 was not introduced to the world until the 1973 AES show in New York.