Let's see your stash

Post by **stipud** » Sat Jan 05, 2008 12:07 pm

Dag Martin, welkom in onze groep hier

Das een groot beeld zeg

marko · Post by **marko** » Sat Jan 05, 2008 12:18 pm

that's a monster on an avatar!! hope your collection of pg is as big

martinkruit · Post by **martinkruit** » Sat Jan 05, 2008 1:25 pm

Sorry, on the car audio forum i'm visiting every day it does not look that big.

http://forum.showyoursound.nl/default.asp

I've changed it now.

And my collection off PG is not that big.

I will start to look for all the pictures

@Stipud, je spreekt Nederlamds (altans je schrijft Nederlands) waar kom je vandaan??

martinkruit · Post by **martinkruit** » Sat Jan 05, 2008 3:20 pm

Oke, i will start my list.

As the most off us i have as possible used PG cables
Speakercables,............................................ Interlinks................................Connectors and so on

Back in 1992 i started with one PG MS275

This was my first contact with Phoenix Gold, i sounded great for me.
So on the next holliday i went to Florida because the amps were 1/3 off the Dutch price and bought met two other MS275's
After that the back off my car looked like this.

When i stopped with this car and put away the amps temporaly, they where stolen.

In 2005 i started car audio again and bought a used MAC200

Wich i still use to test speaker boxes.

Also i bought a ZX Ti 500.4

Not the right picture but pretty close

Which we rebuild to a Phoenix Gold ZX Ti 500.2 with embedded Musical Fidelity Tube Pre Amp.

We did some modifications Tubes are working on +/- 35v
the are JJ type E88CC. We deleted the Filter section Less = More principle. (Modifications are done by Bertje (12VHifi.nl) Also a member on this Forum.

The sound off this project is great.

At this moment building the car off my wife and this is what will be in the trunk.

A PG M50 special edition (instead off white he is chrome with original PG printing)

A PG M44 special edition (instead off white he is chrome with original PG printing)

A PG EQ215 special edition (instead off white he is chrome with original PG printing)

I also own a Bass CUBE, a Carver Cathedral, Carver Image Enhancer and a Audiop Control 1.3 oct equalizer

Post by **Wakeup** » Sat Jan 05, 2008 3:44 pm

VERY NICE JOB Martin on that tube modification! Love it....how does it sound?!

1moreamp · Post by **1moreamp** » Sat Jan 05, 2008 4:01 pm

Nice Tube frontend mod but I have a single issue with the new case design... I see no vent holes to allow hot air to leave the new case, this will cause thermal issues very quickly.

Am I missing something ???

seandiguer · Post by **seandiguer** » Sat Jan 05, 2008 4:38 pm

Very Very Cool. But can someone explain to be how he combined the tubes into the zx500?

Post by **mr tibbs** » Sat Jan 05, 2008 4:42 pm

I'm wondering if you had the chrome silk screened by PG or did you do that yourself?

1moreamp · Post by **1moreamp** » Sat Jan 05, 2008 5:28 pm

seandiguer wrote:Very Very Cool. But can someone explain to be how he combined the tubes into the zx500?

Easy, he bypassed the crossover input board that sits on top of the main amp board.
He had to custom design the tube circuits to run off +- 35 volts the amps main drive section runs off.
So to recap he removed a large PCB that sits over the main board, so the amp is now a straight four channel amp with no crossover or bass boost. Pretty clean approach, lots of work though.

The tube circuit could have been powered by a voltage doubler or tripler power circuit if need be, the power supply could have been modded with the needed rectifiers and caps to make the high voltage. But I think he was trying to keep it simple and audiophile clean so he went with 35 volts on the tubes.

Not a easy task but a task of love for sure.....C

eyesofra · Post by **eyesofra** » Sat Jan 05, 2008 7:32 pm

tube gain stage and PG power stage....this is = sex

Post by **stipud** » Sat Jan 05, 2008 9:57 pm

Martin,

Ik ben Kanadees, maar ik heb wat familie daar in Nederland. Ik ging in 1992 ook een halve jaar naar school (groep 3!).

Ik heb je fotos wel eens gezien via Google. Heel mooi werk!

martinkruit · Post by **martinkruit** » Sun Jan 06, 2008 12:33 am

@Wakeup, it SOUNDS GREAT

.
The pre amp is a design from Musical Fidelity its the X10, but modified.

@1moreamp, at the left site of the amp there is an ventilation hole, so the air passes the tubes first and then it flows directly over the heatsink.
And you explination is right. I'm now searching for building a power suply that can deliver +/- 70 volts. Then the amp will sound even better.

@Mr Tibbs, you mean the M50 and M44? They are chromed and printed again by Phoenix Gold.

@eyesofra, your totaly right

@Stipud, vandaar, maar we praten hier beter engels, anders begrijpen ze er niets van.

Post by **Wakeup** » Sun Jan 06, 2008 1:47 am

MAn....wish I could have a listen to it!

nice work! Keep us informed of your ventures!

martinkruit · Post by **martinkruit** » Sun Jan 06, 2008 3:24 am

I will make two showcases overhere in the install section.

Meanwhile you can see my car in this showcase (not fully updated)

http://www.showyoursound.nl/Public/Show ... sp?id=3028

It is a Mercedes Bens Van - V-Class 220CDI (170 Hp - 360 Nm)

dwobert · Post by **dwobert** » Sun Jan 06, 2008 9:43 am

unbelievable you most have the best collection ever. I want to know if u have or know anyone with a fan shroud for a ms 2250 looks like u have two complete units. I had mine stolen about 8 years ago and i just got it back but the shroud kit was gone. any help would be great since Phoenix Gold is no help these days.

1moreamp · Post by **1moreamp** » Sun Jan 06, 2008 10:06 am

Morning martinkruit,
try looking into a simple voltage doubler tied to the toroids windings used for the 35 volt out. I am sure you can get this to double or triple in voltage fairly easy, by using a set of high speed diodes and a few caps.

The other way is to hand wire more wire turns on the toroid to get separate windings to do the job like I have seen on PPI/Butler amps.

A very nice effort Thanks you for the inside look, Always love to see new engineering

Bertje · Post by **Bertje** » Sun Jan 06, 2008 10:45 am

I built /modded the Ti450 from Martin. It was a lot of work, I also replaced the opamps at the frontend to LM4562. The gains are turned fully down (could be removed also..).

The pre-amp from Musical Fidelity X10D has original a power supply of +30 and -30V, so it runs fine on the +/-35V from the PG. The original MF has a gain from 1-1,1x. but I did it to 2x.

Next EMMA SQ competition season maybe the new European champion pure passive ...(of niet Martin...

)
Rob
12V Hifi

martinkruit · Post by **martinkruit** » Sun Jan 06, 2008 10:55 am

Lets try to

1moreamp · Post by **1moreamp** » Sun Jan 06, 2008 11:08 am

I agree the op-amps could go easily as the drive from the tubes should be plenty. In any case a very nice effort, and with the custom case work I can see you spent long hours in this project...... C

Bertje · Post by **Bertje** » Sun Jan 06, 2008 11:23 am

I tried to modify the inputstage, without the input opamps etc. Nevertheless I didn't succeed, and the LM4562 sound really great, so I decied to stick to the original circuit. No problem

.
Rob.

MINI COOP · Post by **MINI COOP** » Sun Jan 06, 2008 12:53 pm

I also want to listen to the amp of martin, maybe at a next sq meeting in nl or be I hope

I'm from belgium, my components:
- PG zx450
- PG zx500
- PG eq230
- PG basscube

this drives:
- DLS ur6s (MP 7 series set on his way

)
- JL audio 15w3v2

I hope that I can compete with martin, the futher will say that

BG_001 · Post by **BG_001** » Wed Jan 16, 2008 11:03 am

holy wow tristan. i had to change my pants twice to look at those pictures. That had to have been an all day affair laying all of those bad boys down like that.

this thread is making me worthless in class right now.

maxxsq · Post by **maxxsq** » Wed Jan 16, 2008 12:09 pm

I have some new PG products to show. Thanks to Nico I now have 2 very nice amplifiers more in my collection, ZX 450 and MPS 2500.

martinkruit · Post by **martinkruit** » Sun Jan 27, 2008 8:36 am

Just won at Ebay a nice M100

off course this will be chromed like the M60 and M44 i already own.

All 3 amps will be modified to sound even better.

marko · Post by **marko** » Sun Jan 27, 2008 9:32 am

martinkruit wrote:Just won at Ebay a nice M100

off course this will be chromed like the M60 and M44 i already own.

All 3 amps will be modified to sound even better.

what about having it re silk screaned? i don't think pg can do this anymore?