Layout 5th Generation 183

[tylerbaster]

I know of 1 in the 130's. The amp has "classic" tone stack. EL34."deep"label on the chassis.

[chris_sanford]

Chris.. Just saw your post.. AFAIK The Dropper on 192 was 40k 10 WW to PI 12K to V2 and 2.2k.. Hey if we want to call it MM PS fine by me..

Tony

That's cool. And thanks for the info on 192! That's somewhere between what I would call 'precision' and what the earlier MM amps have. Very interesting...

chris

[talbany]

Chris.. Just saw your post.. AFAIK The Dropper on 192 was 40k 10 WW to PI 12K to V2 and 2.2k.. Hey if we want to call it MM PS fine by me..

Tony

That's cool. And thanks for the info on 192! That's somewhere between what I would call 'precision' and what the earlier MM amps have. Very interesting...

chris

Hey Chris..Yeah Iv'e tried both.. The 12K will give you 208-210 V1 and 215-218 V2.. The 22k will give you 185-189 V1 and 190-192 V2 depending on how you want the thing to respond.. Thought I'd mention..Most of the MM 2000 series transformers I've seen and worked with they are all pretty much dead on 700v give or take a volt or so under load of coarse.. Also FWIW the 200-130 series are perfect since they have a bias tap and an extra 6v filament winding to run the relays (voltage doubler of coarse) This is how HAD did it in 192..
Whatever this is worth!!

Tony

[chris_sanford]

Hi Chris,

Is the amp on this picture you've attached #182? I ask, because AFAIR #182 is the only ODS with this combination of specs and front plate look I have ever heard of.

Yes, that's a picture of 182. A strange one for sure!

If the classic > skyline transition generation amps you know have been originally built with a skyline or with a classic circuit would perhaps be possible to tell apart by the way the skyline circuit is done in detail, the status quo of the goop in this amp and the code numbers of the pots and the specs of other parts etc.

I don't have the codes from the pots from these amps, but they look to be similar to the other ones already present. Also, the goop appears to be of one flavor, and non-molested. If they were modded, they would have to have been completely and cleanly de-gooped, and that seems unlikely to me (though not impossible!).

In all the updated amps I know the update is rather obvious IMO if you take into account all the details in the given amp.

I agree. The Maken Music amp was pictured in the GP article, and there were different colors and layers of goop, iirc. I will need to go back and take another look at it to be sure, but that's what I remember. BTW, you mention that you believe that the Joey/Maken/GP article amp is the same as the Ultrasound one, and I don't think this is the case. I've seen that amp in person, and the cab is covered in tweed, not tan tolex. Same panel graphics though.

chris

[chris_sanford]

The Maken Music amp was pictured in the GP article, and there were different colors and layers of goop, iirc.
chris

Just re-read the GP article where the Maken amp was reviewed (Oct. 1994) and there were no internal pics. I guess the mind is not what it used to be, sorry guys.

chris

[erwin_ve]

I know of 1 in the 130's. The amp has "classic" tone stack. EL34."deep"label on the chassis.

You mean 10k GNFB?

[tylerbaster]

I know of 1 in the 130's. The amp has "classic" tone stack. EL34."deep"label on the chassis.

You mean 10k GNFB?

The GNFB resistor is 3.9k.

[chris_sanford]

I know of 1 in the 130's. The amp has "classic" tone stack. EL34."deep"label on the chassis.

You mean 10k GNFB?

The GNFB resistor is 3.9k.

Do you know if the FB is coming from the 8 or the 4 ohm tap?

Thanks!

chris

[chris_sanford]

Thought I'd mention..Most of the MM 2000 series transformers I've seen and worked with they are all pretty much dead on 700v give or take a volt or so under load of coarse.. Also FWIW the 200-130 series are perfect since they have a bias tap and an extra 6v filament winding to run the relays (voltage doubler of coarse) This is how HAD did it in 192..
Whatever this is worth!!

Tony

Thanks for the info Tony! I'd really like to build one of these someday.

chris

[makrisp]

Mr. Dumble,

Have you received your amp yet?

[SuperReverb2]

Mr. Dumble,

Have you received your amp yet?

Yes he has! He's working on pics and clips as we speak. Just got off the phone with him as a matter of fact. In a nutshell. "HE LOVES IT!!"

[CHIP]

What's up with the Bright switch on this amp?
Is the 220pf cap across the vol.pot, in normal operation,or is the switch an on-off-on switch?

[tylerbaster]

Do you know if the FB is coming from the 8 or the 4 ohm tap?

Thanks!

chris

Hi Chris,

Sorry for the delay.I don't know which tap HAD used.

[ToneMerc]

What's up with the Bright switch on this amp?
Is the 220pf cap across the vol.pot, in normal operation,or is the switch an on-off-on switch?

Normal is relative; the switch toggles between 100 & 220pf and I assume the center position is off.

[andyhardy]

Just looked at this again
are the v2 snubbers really 25pf or should they be 250pf

Cheers