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PM 600 power amp

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merle

Newbie

Posts: 8

Joined: Tue Apr 20, 2010 3:20 pm

Post Thu May 06, 2010 6:19 am

PM 600 power amp

Hello, I'm Merle.

please forgive a newbie question.

I recently purchased a second hand PM 600.
Just wanted to know what I need to check before firing it up. Are there measurements to do to see if it works properly, and where ?

any help or advice appreciated.

you can see my current audio rig in the appropriate section.
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TNRabbit

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(pair of) SILVER-7 TUBE AMPs

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Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Thu May 06, 2010 6:46 am

Re: PM 600 power amp

Welcome, Merle!

I don't know much about the professional amps, but someone we'll be along with more information. Be patient; the membership here is small & most work during the day, so it could be a while to get a reply~
TNRabbit
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From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
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Bill

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SILVER-7t

Posts: 1175

Joined: Thu Jun 29, 2006 6:41 pm

Location: Chanhassen, MN

Post Thu May 06, 2010 10:25 am

Re: PM 600 power amp

I've always wanted one of these, just to see how close they are to the non-pro amp sound wise.
You can't fix stupid.
George wrote:In certain configurations you need a permission slip from your Mom to bridge amps.
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engtaz

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"TAZ"

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Joined: Sat Jun 30, 2007 1:43 pm

Location: Tampa, FL

Post Thu May 06, 2010 11:27 am

Re: PM 600 power amp

I tend to try out amps that Im not sure of on a spair speaker. I hook up only 1 channel at a time and input audio 1 input at a time. The adjustment pots are normally dirty so work them back and forth.
Specs are:
8-ohm FTC rated power/ch 200W
4-ohm FTC rated power/ch 300W
Bridged mono power 700W
4/8-ohm FTC rated THD 0.5%
IM Distortion less than 0.1%
Input Impedance (Line) 15k ohm
Input Sensitivity 1.5Vrms
Gain 28.5dB
Rated full power bandwidth +0, -3dB at 5Hz & 80kHz
Slew Rate 25V/u sec
Power Consumption 950 Watts
Fusing 8 amp slo-blo
Damping 200 at 1kHz
Dimensions (HxWxD inches) 3.5" x 19" x 11.56"
engtaz


Carver M4.0T in front channels to Caver AL VI's in SACD & 2 Channel setup
C 16, PT 2400, Slim Device, Carver TX-8, 490T and Rega TT w Grado Gold cart in the 2 channel setup
Bogen SRB20 is computer amp
Carver PM-350 donated for youth church use
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merle

Newbie

Posts: 8

Joined: Tue Apr 20, 2010 3:20 pm

Post Fri May 07, 2010 2:11 am

Re: PM 600 power amp

Thanks everyone.

this amp is really well built.

I'll find spare speakers and try not to blow 'em !

I'll keep you informed, and will take some pics of the guts. PCB is of stunning quality.

Powering the amp up, there's a slight mecanical hum (50Hz buzz ?)coming from it. Not really loud, but definitely audible (No speakers connected.).

Is it normal ?

funny thing : my setup is now (almost) 100% made in U.S.A !

Krell- Wadia- Altec- MIT- Carver. Next step, a Wadia transport !!!

best regards,

Merle
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TNRabbit

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 13342

Joined: Sun Jan 14, 2007 11:53 am

Location: TN Native Languishing in VA

Post Fri May 07, 2010 3:23 am

Re: PM 600 power amp

50 hertz? Where are you located??

Not uncommon for the transformer to have a hum....seems to be the norm on older stuff rather than the exception. As long as it isn't coming through the outputs, you're golden~
TNRabbit
Image

From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
<<

merle

Newbie

Posts: 8

Joined: Tue Apr 20, 2010 3:20 pm

Post Mon May 10, 2010 3:22 am

Re: PM 600 power amp

I live in Switzerland, and AC is 50Hz, 240V.
I guess I'll begin by checking DC offset at the output. If it is fine, I'll try with a spare Rowen R4 loudspeaker.

pics soon...

regards,
Merle
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BillD

User avatar

(pair of) SILVER-7 TUBE AMPs

Posts: 7295

Joined: Wed Jun 06, 2007 8:29 pm

Location: The west's most mid-western town, Scottsdale, Arizona

Post Mon May 10, 2010 1:15 pm

Re: PM 600 power amp

Well, with that sensitivity, if you put 1½V in at 1000Hz (AC), you should read 200W (0dB) on the LED meter with nothing attached. That would tell you if the thing will go into protection or not. If it passes that test, I wouldn't hesitate to attach speakers to it. Free signal generators are available for a computer, and you can attach it to a preamp and adjust the level on the preamp to get 1.5V out with the tone generator software generating 1kHz. You do have a volt meter, yes?
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer
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merle

Newbie

Posts: 8

Joined: Tue Apr 20, 2010 3:20 pm

Post Thu May 13, 2010 8:39 am

Re: PM 600 power amp

Hi BillD.

Of course I do have a MM. I'll do the test this w.-e.
I hope everything is Ok.

Thanks everyone.

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