Carmen Ghia schematic/layout?

[Omar]

What i dont get is why its such a crime for peopel to post dr z schematics, since as far as i can see as long as its not his original copyrited material, what laws are being broken, since its perfectly legal for someone to rip off an existing amp and sell it as their own (as long as there is no patent), i dont get what the big deal is, okay the Dr guy makes a big deal but what can action can he take?

Legally, I don't think there is an issue with posting the schematic. Probably doesn't fall under a copyright or trademark but under intellectual property (I'm no lawyer).

The issue is a rule I set up - if it's an amp that is currently in production, I prefer that the schematics not be publicly posted. The point of the board is to build amps for personal use. The problem is that people have taken schematics along with findings/ideas/pictures/etc posted on this board and have turned it into a commercial product. There is no way to regulate this. The original amp builders are trying to make a living and I don't want to undercut their livelihood.

Omar

[macula56]

I don't personally get the Dr.Z thing. I've never heard one that I liked and wouldn't waste my time building one.

Allynmey[/quote]

i don't really get it either. i had a MAZ Sr. for about 2 weeks. very nice amp. i took a look under the hood and i didn't see anything that i hadn't seen before. but it is a nice amp. very well made.

[eggman6]

Just some interesting info i found regarding patents. Acording to a uk Intellectual Property website.

patent:
It is a deal between an inventor and the state in which the inventor is allowed a short term monopoly in return for allowing the invention to be made public.

Also intelectual property just refers to the types of protection such as trademarks, copyrite and stuff.

Also if people do ripp off other peoples amps for profit, i dont see how that would have impact on profits, firstly it would be sold under a different brand and it will be seen as a different amp alltogether, and even if the amps were sold as say Dr z Carmen Ghia clone (which wouldn't be allowed), it would not sell anywhere near the price of the real thing, becasue if you was after a Dr Z amp, would you spend your money on some unheard of amp maker making clones, or buy the real thing.

In other words there is no way an amp builder (if following the IP regulations) could have any impact on the sales of the original amps, becasue it would require the the amps to be renamed, look different, and have no references to the original amp. Unless you was told, or played both amps you wouldn't have the slightest idea it was a ripp off. Now if someone can come up with a decent explanation to how, this could have an adverse effect on the original designer or builder, and keeping within the IP laws, then i'd liek to see it.

[David Root]

I too have not seen the Carmen Ghia schematic, but I have looked over the AO35 schematic. Where is the magic? Is it just the use of pentodes in channel 1 & 2? Yes, I see the mids tone control in channel one, the tonecap/inductor switching in channel 2, a pentode recovery stage, what looks like a tremelo circuit, an EM 84 indicator tube, a pre-longtailed PI, cathode bias power tubes, choke fed plates, UL operation and a slightly unusual NFB arrangement. Plus it seems to be on two chassis, connected in a similar manner to an old SVT.

What am I missing?

[David Root]

Please disregard my above post. I got my schematics mixed up. Duh!What I described is the Selmer Zodiac, not the Hammond AO35.

[chief mushroom cloud]

Hey now...don't be dissing the Zodiac...I just got me one to restore

I don't see the magic in an AO35 sch either......but w/ a lil tweekin......it could sound like a.........Fender
LOL

[David Root]

Now I got the right one! Do I see fixed bias on the PI, and a fixed hi-cut (R22/C13)?. V1A looks a bit different too.

[outtahear]

Ah what the hell....I'm in. I have a schem, for the Carmen G, not too sure how correct it is. If someone has a schem, and/ or layout they'd like to share, I'd be much obliged.
Thanks.

[Clyde]

The CG power amp is a direct copy of the A035, nothing is changed. The preamp is Dr Z's and is shared with a few other models. I was really underwhelmed with the sound of the CG, but some may and probably will like it.

[van_wylde]

Hi there

I would luv the Carmen Ghia schematic if anyone has got it

brendon.w@bordernet.com.au

regards Brendon

[Aharon]

The above few posts are very confusing to me. Let's start by giving proper due to Dr. Z, HAD, and KF and everyone else who's interpetations of existing circuits are loved by many. I have been for the better part of two years on this forum and others trying to understand the psychology of people who take public domain ideas, market them and then turn around and claim foul when others are curious about them or change one or two parts and market the circuit themselves. I find it hard to comprehend the mindset. When home amp builders copy a circuit that itself was copied, boutique builders inevitably come back with "your stealing food from their employees mouths". It seems like they adopt a "I stole it first" mentality.

Schematics pop up on forums and members build their versions of those amps all the time. This is an ampbuilding forum. It's why we are here. Otherwise, we could all hang out at the Gear Page worshipping the top guru of the amp world like serfs.

I don't begrudge anyone making as much as they can from ideas that are public domain. I just have a problem when that same person has a problem with me or anyone else doing the same or just building for themself.

People who believe that these circuits are the property of these builders who look down at builders as thieves, maybe you should do a patent or copyright search on those circuits. you'll give up after a while and realize how silly the whole argument is.

My opinion only!


Allynmey

Totally agree with Allynmey..............

Other things that irk me about some posts in general...........

Name dropping....the when I met so and so (insert your favourite rock star/s here)..............WHO CARES!.

PAt yourself in the back post...........cuz I'm an EE........WHO CARES!!

Knowing THA MAN........I know this guy that has more chops than Hendrix and EVH put together but he only plays in his room behind closed doors.

Why bother making a clone if I can buy the amp for $XXXX.......bud,sorry to tell you ,you got ripped off,I never made an amp that cost me more tan $200.


I know this guy that made the best amp ever but lost the schem so now he ony makes a "tribute to the best amp ever built".

You can only clone certain amps most likely the ones I tell you you can clone cuz I just want to control people.........

Chastize people for wanting schems while secretly jonesing for all of them just to keep them all to yourself and build the best amp "thereeverwas"...


When all else fails and all your amps sound like shitze (when you play through them)start looking at cap orientation and or stray magnetic flux as the probable culprit.


Those who can play....play ,those who can't.... build amps.



All in good fun guys
Aharon

[riscado]

does anyone have the carmen ghia schematic after all, I'd like to check the tone control to use in a 2x6V6 amp of my own...

If someone can send it through PM I'd appreciate, I have no intention of seeing Dr z's schematics posted over the internet, I now it's not illegal but if they were mine I wouldn't be all to happy either.

[skyboltone]

The CG power amp is a direct copy of the A035, nothing is changed. The preamp is Dr Z's and is shared with a few other models. I was really underwhelmed with the sound of the CG, but some may and probably will like it.

[IMG:999:712]http://i9.tinypic.com/4qp24jm.jpg[/img]

[riscado]

I know the hammond ao-35, that's not what I'm interested in, I'm only interested in the tone control on the ghia, like I said I'm trying to incorporate something similar in my own 6V6 design...

a tone control that affects mids (or fatness of tone) rather than bright or les brigh...

[txbluesboy]

I would like to be on this gift list as well, If possible. Thanks