Metro Amps Transformers?

  • Thread starter Thread starter BesaMoogie
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BesaMoogie

BesaMoogie

Well-known member
Does anyone know, when metroamps will have transformers back in stock for builds?

I noticed that their site states, that due to supply shortages they are currently not available. However, Covid is over, so I‘m wondering if they will by back in stock any soon?
 
BesaMoogie said:
Does anyone know, when metroamps will have transformers back in stock for builds?

I noticed that their site states, that due to supply shortages they are currently not available. However, Covid is over, so I‘m wondering if they will by back in stock any soon?
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What are you looking for?
 
Either that or order a C1998 from Marstran. The one technomancer is pointing you toward will save you some money and pretty much get your in the same ballpark.
 
Dale B said:
Either that or order a C1998 from Marstran. The one technomancer is pointing you toward will save you some money and pretty much get your in the same ballpark.
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Yeah they're all Heyboers
 
The C1998 from Marstran is a killer OT in my opinion. I've had Merren, Heybour and MM in Marshall Jose style build and while they all were awesome sounding, very slight differences.
 
jasonP said:
The C1998 from Marstran is a killer OT in my opinion. I've had Merren, Heybour and MM in Marshall Jose style build and while they all were awesome sounding, very slight differences.
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I have a Marstran C1998 in an Adam Jones clone with a LarMar. Then, I have a Mercury O100-JM in a 2203 build. I've been extremely happy with both of them.
 
LP Freak said:
What are you looking for?
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So far I have a Plexi and a 2203 clone build both with TAD OTs (clones of a C1998 made by Dagnall)
When comparing the 2203 to my original Marshall 2204 from 82, I get the impression, that the 2203 falls apart faster when turning up the volume. As far as I know, it should be the other way around.

So I was thinking of trying an OT of a reputable builder could maybe help???
I admit it‘s a dive into a whole rabbit hole here, but there’s definitely some interest in exploring this topic
 
jasonP said:
The C1998 from Marstran is a killer OT in my opinion. I've had Merren, Heybour and MM in Marshall Jose style build and while they all were awesome sounding, very slight differences.
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Can elaborate what kind of difference to expect from those brands? I looked in those brands as well but there’s not that much people around that had all of them in builds to compare
 
BesaMoogie said:
So far I have a Plexi and a 2203 clone build both with TAD OTs (clones of a C1998 made by Dagnall)
When comparing the 2203 to my original Marshall 2204 from 82, I get the impression, that the 2203 falls apart faster when turning up the volume. As far as I know, it should be the other way around.

So I was thinking of trying an OT of a reputable builder could maybe help???
I admit it‘s a dive into a whole rabbit hole here, but there’s definitely some interest in exploring this topic
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Ok, I have a couple PT but no OT
 
BesaMoogie said:
So far I have a Plexi and a 2203 clone build both with TAD OTs (clones of a C1998 made by Dagnall)
When comparing the 2203 to my original Marshall 2204 from 82, I get the impression, that the 2203 falls apart faster when turning up the volume. As far as I know, it should be the other way around.

So I was thinking of trying an OT of a reputable builder could maybe help???
I admit it‘s a dive into a whole rabbit hole here, but there’s definitely some interest in exploring this topic
Click to expand...
What are the voltages in the amps? That will make a difference too. I’m no expert on the MV circuit but I think I’ve read others here prefer fairly high voltages in those.
 
BesaMoogie said:
So far I have a Plexi and a 2203 clone build both with TAD OTs (clones of a C1998 made by Dagnall)
When comparing the 2203 to my original Marshall 2204 from 82, I get the impression, that the 2203 falls apart faster when turning up the volume. As far as I know, it should be the other way around.

So I was thinking of trying an OT of a reputable builder could maybe help???
I admit it‘s a dive into a whole rabbit hole here, but there’s definitely some interest in exploring this topic
Click to expand...

It could be that the PT doesn't have enough available current, you could also up the filtering. I personally like 2203's with 100uf on the plate B+ rail vs. the stock 50uf. Have you measured the B+ at pin 3 of the power tubes? It should be close to published specs. If it is too low, it will fall apart when cranked...
 
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SpiderWars said:
What are the voltages in the amps? That will make a difference too. I’m no expert on the MV circuit but I think I’ve read others here prefer fairly high voltages in those.
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Internal Voltages are up to specs and in the preamp section within a few volts, when compared to the 2204. The 2204 has the lower PV of 390v and the 2203 has 450v which again to my knowledge, should give you an overall firmer sound.
 
BesaMoogie said:
Internal Voltages are up to specs and in the preamp section within a few volts, when compared to the 2204. The 2204 has the lower PV of 390v and the 2203 has 450v which again to my knowledge, should give you an overall firmer sound.
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If I’m understanding you that makes it sound like one of the amps has something altering the preamp voltages from ‘nominal’. Either the 2204 preamp voltages are higher than normal or the 2203 voltages are lower than normal. With a 60v HT difference between the amps I would expect there to be a preamp voltage difference.

I’m not 100% on this number, maybe someone else can confirm, but I think Jason at Headfirst likes to see 320v-330v at the Phase Inverter in Marshalls. The other preamp voltages fall into place with the stock 10k resistors but an adjustment to those first resistors (often 10k+10k or 10k+8k2) to get the PI in spec might help.
 
SpiderWars said:
If I’m understanding you that makes it sound like one of the amps has something altering the preamp voltages from ‘nominal’. Either the 2204 preamp voltages are higher than normal or the 2203 voltages are lower than normal. With a 60v HT difference between the amps I would expect there to be a preamp voltage difference.

I’m not 100% on this number, maybe someone else can confirm, but I think Jason at Headfirst likes to see 320v-330v at the Phase Inverter in Marshalls. The other preamp voltages fall into place with the stock 10k resistors but an adjustment to those first resistors (often 10k+10k or 10k+8k2) to get the PI in spec might help.
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Yes, I`ve seen the YT video of Jason talking about that.
The 2204 has 323V on the PI node, the 2203 clone has 318V. This small difference translates through the rest of the preamp.
The most curcial difference is the PV on the powertubes. The 2204 has the low PV of 392V whereas the clone has 452V.
The 2204 PT puts out less voltage but the amp is missing one 10k resistor in the B+ support line to get the 323V on the PI noede.

Fusionbear suggested upping up the filtering in the clone as it`s higher PV does "tax" the filterstage more. I will try this!
 
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