Marshall 2210 And Its Terrible Channel Changing
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- Опубликовано: 25 авг 2024
- A really weird bad switching circuit from Marshall, restored to all its, um, glory?
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I know little about amp service, but I watch your videos anyway, I find them relaxing and cathartic 🙂
I just wanted to pop in and say I really like your channel! It’s so interesting and informative, and I really appreciate you sharing all your knowledge and experience. Keep up the good work dude 💪
A tip I have heard from retro computing folks is to test the printing on ic chips with isopropyl alcohol. If it rubs off, it's a counterfeit. Don't know if that can help you, but I thought I'd mention it.
Oh, I did that before trying them. Print stayed on.
@@PsionicAudio cool. Congratulations for the 20k👍👍👍
That's it, I'm buying an old silverface Super Reverb, getting it safe and properly running, and be happy.
The 1968 drip edge is the way to go imo. They’re the most visually appealing out of all black and silver panel amps to me.
I'm looking at a '76 silver face Twin atm. I may buy it even tho I can't justify owning it. :)
DrRuss, I just did some vids featuring a ‘76 Twin (sometimes with a ‘78/‘79 Super too). Good amps once restored. I used the MV in the demo - it gets down to apt level if needed.
And the prices will only go up.
@@PsionicAudio The amp I'm looking at has been re-capped 5 years ago according to the owner but he said he hasn't changed tubes in 20 years. The speakers look original. He wants $800 for it. It is the 85watt version. I owned a 135 watt '77 Silverface a long time ago and it would knock birds out of the sky flying over my house if I dimed it. Great cleans but eeegads the weight. Thanks for the reply.
those chips are well know in analog Synth circles, is just an array of BJT NPN transistors. They are widely used in voltage controled filters (vcf), V controlled amplifiers (vca), and all kinds of things where you need control (even as a precision current source for oscillators, since they have a pair of matched transistors (q1 y q2, connected internally as a differential pair) and they are all together on the same piece of silicon, so they can compensate for temperature/current drift)
CA3046/3086, LM3046/3086 are equivalents
I owned one of these back in the 90s. Think mine was an 86. I had good luck with mine for quite a few years. I ended up selling it and buying a Twin which I used up until last year. I owned a JCM 2000 TSL 60 that I actually liked more than the 2210 as it had a great clean channel.
Have a 4210 combo. Gutted it and turned it into a 3-channel fire breather just using the transformer set and doing away with the reverb tank and transformer!
Amazingly, Marshall played with voltages over the years and this 50W has a low voltage PT running at like 400V on the plates!! I really actually like it lower and squashed and saturated. It's my favorite amp in the house out of like 20 amps!!..but did away with the Marshall BS!
I had a 1987 and was good. I have now original 1986 and have only a little channel bleeding… for me this is a very good sounding Marshall. (Different from 2203 of course). If it was a garbage , norum and many others don’t use it anymore I think Maybe….
ok now that is a Marshall
I ripped all this stuff (IC, diodes, cap) out of my 2210 and replaced it with 2 relays (and a small 6V PSU for them). Dead quiet channel switching.....
Hmmm, might have to do some mods when I get my 4210 out of storage to refurb it. I remember the switching circuit went wrong years ago so I will probably look at changing it. It's a shame your customer didn't want a proper fix instead of just a like for like repair. I would like to have seen what you would have done with it.
I really wish I knew how to do these repairs, not just because I’m a musician, because I love fixing things
For a new tech, do you recommend keeping a stock of common parts, or order piecemeal with each job?
Hmm, when you're new you won't really know what you'll end up using a lot of. I try to keep the most common value (Fender, Vox, Marshall) resistors in at least 1/2W CF (though I also stocks CCs for restorations), the most common film cap values (same amps) mostly in Panasonic ECQs (they work in a lot of different amp layouts) and the "usual suspects" for electrolytics from F&T and Vishay. And Vishay 3W-5W resistors for screen grids, most common fuses in 5x20 and 3AG sizes, etc. But it can be a lot to lay out costwise when starting out.
So the best solid advice I can give you is look at quantity discounts, and to learn how to navigate the Mouser and Digikey websites. A 34 cent resistor can be a 2 cent resistor if you order 100 of them. So let's say 100K resistors - if you do amp repairs you'll definitely use them all the time for plates. Odds are you'll want to order 100 of them, either CF or MF.
But also learn to work the shipping. Mouser has a pretty flat $8 shipping charge for almost any order. So if I need to order something specific for one client's amp, I'll often go through my parts bins and think "hmm, I only have seven 2.2K CFs left." So I'll add 100 of them to the order. Because I don't want to pay $8 shipping for one 34 cent resistor because I ran out.
But don't order more things than you have organized storage for. Ask me how I know.
For me, nothing worse than having to order parts that I should have in stock. Good inventory is getting thin out there and it's frustrating when you can't get .68 caps. Inventory is $$, but so is time. Really depends if you build or just repair, but some standard stocked parts are a given. It would be a good video to see/hear what Lyle thinks, but he does live near a nice parts house and I'm half a day from any real town.
I agree! Those 2205/2210's were not Marshall's best. Poorly designed channel switching, chips/diodes for gain, etc.
yep. the channel switching. the fizzy tone, the meh channels and reverb. the signal bleeding. the super thin single-sided PCB traces that get burnt up!! As its, is a POS and timebomb waiting to explode...or at least fail!
The only thing going for the 2205 & 2210 is that L7 used them, great band.
BUT, these amps are chock full of terrible engineering. Your video is case in point...
But(2) they are great sounding amps when working right.
The much maligned and oft misunderstood JTM series have a very nice clean channel too.
They are terribly made though. Actual fire hazards. I cannot recommend them.
@@PsionicAudio I know you’re a busy guy, but can you elaborate? I have the 30 and 60 watt versions. Thanks Lyle. Appreciate ya.
There are some JTM 60 repairs on my FB page. The diode bridges love to burn. Really slapdash construction overall - flimsy, excess wiring, poor connections throughout.
@@PsionicAudio Thank you kindly sir!
Is there a mod that could be done to improve the channel switching?
yeah. throw it out and use a traditional relay switched scheme!!
@@RozsaAmplificationLLC yes. of course. Thanks. I have a 2205. No problems on low volume, but it’s detectable at high volumes.
Yes, I could. But the client just wanted it restored.
PS simple transistors would be easier than using relays. The muting here is a good idea done poorly.
@@PsionicAudio thanks
@@PsionicAudio Relays are pretty easy. I think you just mean "cheaper", which agree 100%! $.10 parts v. $3.50 parts!!
Have you ever done a video on a Soldano amp? I have wanted one of those for a long time, but that’s based purely off the sound. I have no idea how well they are made compared to others.
Mezzabarba has a new amp they are showing at NAMM right now. You might want to check it out before you pull the trigger on a Soldano.
I think alfa rpar offers a modern clone of the ca3046, the as3046
A very popular amp. Clipping diodes give it more distortion. And maybe a brighter tone. I wouldn't mind having the 2205 version.
Hi I had one...The best amp I ever owned ..it had 6550 pwr tubes...Dave
I’ve owned a 2210 and a 2205. Not great. I’ve also owned a couple JCM 800 2204s which I found to be far superior.
I have gotten so many fake
Lots of fake chips and transistors in the market. I remember my work bought in loads of 2N222A transistors. All bought from legit distributors. All fake.
Yeah, it's fun. The seller had an A+ rating with lots of electronic component sales, so I thought it might be a safe source. And it might be. The listing never said the chips were tested, just that they were NOS RCAs. And so it's not unlikely that 2 out of 3 were bad at this point.
There are reasons I put in sockets for all chips whenever possible.
it´s a mess
Brother, I hope you’re wearing ear plugs!
2nd
frist
Modern Marshall's are terrible....period.