Speakerplans.com Homepage
Forum Home Forum Home > General > Amp Forum
  New Posts New Posts RSS Feed - "The" Amplifier Internals thread ...
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Topic Closed"The" Amplifier Internals thread ...

 Post Reply Post Reply Page  <1 5657585960 130>
Author
Message
Elliot Thompson View Drop Down
Old Croc
Old Croc
Avatar

Joined: 02 April 2004
Location: United States
Status: Offline
Points: 5172
Direct Link To This Post Posted: 18 September 2009 at 4:32pm

DjLeco

That Amcron Geodyne 1 was sold over here as the Crown Power Base 1. There were two more larger models (Power Base 2, & 3) that reflect the output of the Macro/Micro-Tech 1200 and, 2400.

There was also the CSL Series (which is exactly the same) and, the Powertech Series that offered IOC indicators and front input gain controls.

ychole audio

That price is a steal considering the 8002 was the upgraded version of the Crest 8001.
I believed it cost around $2500 when it was sold new.


Best Regards,


Edited by Elliot Thompson - 18 September 2009 at 4:33pm
Elliot Thompson
Back to Top
DjLeco View Drop Down
Young Croc
Young Croc


Joined: 21 April 2009
Location: Bucharest
Status: Offline
Points: 817
Direct Link To This Post Posted: 18 September 2009 at 4:55pm

Yes Elliot, I know al GroundBridge Series of Crown.

I owned Powerbase 2, and I sold it at good price, and Powertech 2 too, wich I keept exactly for SignalPresenceIndicator / InputOutputComparator bicolor led display, very very helpfull.

 

Also I have modified Powertech 2 in Powertech 3, excepting protection wich was recalibrated also for 2 ohms loading, works perfectly.Clap

Supply was upgraded at 114 Vdc supply like Powertech 3 have,  from 96 Vdc wich have the oficiial Powertech 2, and also one pair of output devices for each side of amplifiers too(all skipped with MJ15003 and MJ15004)Star
 
I will put some pictures of it, soon
 


Edited by DjLeco - 18 September 2009 at 5:26pm
I'm A Stupid SMART Romanian...
Back to Top
DjLeco View Drop Down
Young Croc
Young Croc


Joined: 21 April 2009
Location: Bucharest
Status: Offline
Points: 817
Direct Link To This Post Posted: 18 September 2009 at 5:30pm

 

Class AB supplyed at +/- 84Vcc in IDLE.

In load , supply drops to +/-78Vcc one channel loaded 4 ohms dummy load, and I estimate the supply will drop around+/-74Vcc both channels driving 4 ohms.

 
Very very nice limmiter inside, NO CLIPPING distorsions even with much more level input signal (overloading), than needs for Max pout be delivered
 
Some small movies, excuse porn advertisement...

http://www.netdrive.ws/226494.html



Edited by DjLeco - 18 September 2009 at 6:09pm
I'm A Stupid SMART Romanian...
Back to Top
ceharden View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 05 June 2005
Location: Southampton
Status: Offline
Points: 11776
Direct Link To This Post Posted: 18 September 2009 at 5:46pm
I've got a Bell PSX-6022 (no 'C') here which looks completely different inside and I think must be quite a lot older.  But from the front apart from the C in the model number it's pretty much identical.

If it wasn't buried at the bottom of the pile and my gf has taken her camera away I'd drag it out and take a photo for comparison.
Back to Top
DjLeco View Drop Down
Young Croc
Young Croc


Joined: 21 April 2009
Location: Bucharest
Status: Offline
Points: 817
Direct Link To This Post Posted: 18 September 2009 at 6:11pm
Originally posted by ceharden ceharden wrote:

I've got a Bell PSX-6022 (no 'C') here which looks completely different inside and I think must be quite a lot older.  But from the front apart from the C in the model number it's pretty much identical.

If it wasn't buried at the bottom of the pile and my gf has taken her camera away I'd drag it out and take a photo for comparison.
 
We wait 4 picturesClap, get back your camera!Tongue


Edited by DjLeco - 18 September 2009 at 6:12pm
I'm A Stupid SMART Romanian...
Back to Top
Duncan View Drop Down
Registered User
Registered User


Joined: 23 January 2009
Status: Offline
Points: 50
Direct Link To This Post Posted: 18 September 2009 at 9:41pm
what year was that model manufactured? I was probably not even out of nappies.
Back to Top
Elliot Thompson View Drop Down
Old Croc
Old Croc
Avatar

Joined: 02 April 2004
Location: United States
Status: Offline
Points: 5172
Direct Link To This Post Posted: 20 September 2009 at 7:30pm



I always knew the QSC RMX 4050 was just an upgraded EX 4000.




QSC RMX 4050HD





QSC EX 4000





QSC MX 2000a



Best Regards,

Edited by Elliot Thompson - 20 September 2009 at 7:37pm
Elliot Thompson
Back to Top
samson View Drop Down
Registered User
Registered User
Avatar

Joined: 26 July 2009
Location: london
Status: Offline
Points: 191
Direct Link To This Post Posted: 20 September 2009 at 10:41pm
MATRIX VECTOR 350
 
A small amp with a big heart!!


Edited by samson - 21 September 2009 at 1:41pm
Wisdom is better then silver and gold..
Back to Top
csg View Drop Down
Old Croc
Old Croc


Joined: 17 September 2007
Location: bedford
Status: Offline
Points: 6086
Direct Link To This Post Posted: 20 September 2009 at 11:37pm
there you go
Back to Top
csg View Drop Down
Old Croc
Old Croc


Joined: 17 September 2007
Location: bedford
Status: Offline
Points: 6086
Direct Link To This Post Posted: 20 September 2009 at 11:38pm
and i hope the legs of those output devices are insulated!
Back to Top
samson View Drop Down
Registered User
Registered User
Avatar

Joined: 26 July 2009
Location: london
Status: Offline
Points: 191
Direct Link To This Post Posted: 20 September 2009 at 11:50pm
Originally posted by csg csg wrote:

and i hope the legs of those output devices are insulated!
 
 
I aint got a clue .. first time i have opend it up in 2 years to clean..
 
What bit are the output legs?
 
Should they be insulated with some sort of plastic?
Wisdom is better then silver and gold..
Back to Top
csg View Drop Down
Old Croc
Old Croc


Joined: 17 September 2007
Location: bedford
Status: Offline
Points: 6086
Direct Link To This Post Posted: 20 September 2009 at 11:54pm
The black things bolted to the heatskinks are the output transisitors, which have 3 legs. they should be isolated from the heatsink so they dont short.
 
dont worry - if its working then its fine, but it does look mighty close for comfort!
Back to Top
 Post Reply Post Reply Page  <1 5657585960 130>

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.125 seconds.