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  #1  
Old 13th June 2018, 08:13 AM
Greg.'s Avatar
Greg. Greg. is offline
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Default KaT6550 voltages

I have here a KaT6550 on which I have been doing some repair work. I have restored it to life, but do not have a specific set of test voltages for this amp.

Can anyone supply me with the test voltages for this amp, as per the build instructions which is more detailed compared to the schematic?

How closely could I use the test voltages from the circuit similar KaT34 as a guide?

Thanks in anticipation.
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Old 13th June 2018, 09:10 AM
Richard Richard is offline
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Default Re: KaT6550 voltages

Hi Greg, they're on p. 6 of the Kit6550 text instructions, let me know if you need the pdf

TEST VOLTAGES
voltage label position
125Vdc aT LC - V4 pin 1, RC - V3 pin 1
0Vdc g1P LC - V4 pin 2, RC - V3 pin 2
95Vdc g2P LC - V4 pin 3, RC - V3 pin 3
130Vdc aP LC - V4 pin 6, RC - V3 pin 6
1.6Vdc cP, g3P LC - V4 pin 7, RC - V3 pin 7
6.5Vdc cT LC - V4 pin 8, RC - V3 pin 8
42Vdc g3, k LC - V6, V8 pin 8, RC - V5, V7 pin 8
445Vdc a LC - V6, V8 pin 3, RC - V5, V7 pin 3
435Vdc g2 LC - V6, V8 pin 4, RC - V5, V7 pin 4
6.3Vdc h to h ECF80 heater voltage - V1, V2 measure
between pin 4 & pin 5
6.3Vac h to h 6550C heater voltage - V5, V6, V7, V8
measure between pin 2 & pin 7
450Vdc choke 1 pin 1(HT)
465Vdc choke 2 pin 2
360Vdc none positive terminal of C5
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  #3  
Old 13th June 2018, 10:36 AM
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Default Re: KaT6550 voltages

Hi Richard,

Thank you very much.

The KiT/KaT 6550 assembly instructions, schematic and diagrams are still outstanding for the instruction archive I have been putting together, so if you can forward the pdf to me, that would be really helpful. Thank you.
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  #4  
Old 13th June 2018, 11:11 AM
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Default Re: KaT6550 voltages

Hi Greg,

The 6550 that I did some work on the other week had the original manual with it. The owner is a friend, so I'm sure I would be able to access it again if you have any trouble getting the info you need.

Regards, Phil.
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  #5  
Old 13th June 2018, 01:58 PM
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Default Re: KaT6550 voltages

Many thanks, Phil. I’ll bare that in mind.
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  #6  
Old 14th June 2018, 08:26 AM
Richard Richard is offline
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Default Re: KaT6550 voltages

Quote:
Originally Posted by Greg. View Post
Hi Richard,

Thank you very much.

The KiT/KaT 6550 assembly instructions, schematic and diagrams are still outstanding for the instruction archive I have been putting together, so if you can forward the pdf to me, that would be really helpful. Thank you.

No probs, pm me your email address.
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  #7  
Old 14th June 2018, 09:52 PM
Richard Richard is offline
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Default Re: KaT6550 voltages

Thanks Greg, just sent them
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