| Author |
Message |
    
Legend
Junior Member
Username: Legend
Post Number: 22
Registered: 12-2002
| | Posted on Sunday, March 28, 2004 - 6:29 am: | 
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Hi...
I recently purchased a Palomar Skipper 300. It has been many years since I ran a tube type. I have seen conflicting information concerning the proper operation (tuning).
I saw a post of yours from a long time ago, describing the proper tuning procedure, but I can't find it again. Also, I remember that your post used the words "plate" and "grid", instead of "tune" and "load". Could you please explain the exact procedure again, using "tune" and "load", instead of plate/grid?
You said "dip the plate", and "peak the grid". Could you please walk me through this in as simple a description as possible? I just need to know how to properly manipulate three controls:
Input, on the back of the box.
Tune
Load
________________________________
Thank you. I chose to ask you, because you mentioned in your post that a lot of people do not run their amp correctly. I do not want to be one of those people. This amp has brand new 8950's in it, and I don't wan to shorten their life, by running it improperly. From what I understand, 8950's are very hard to come by nowadays.
Any input from any of the other techs is certaily welcome as well. Thanks again.
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Legend
Junior Member
Username: Legend
Post Number: 23
Registered: 12-2002
| | Posted on Sunday, March 28, 2004 - 10:44 pm: |
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Thanks Buck...
All I could find at that website on the Skipper, was the schematic. And that website lists their info in "PDF" files. I am using Webtv, and it cannot open PDF files.
Yoohooooo... 833, where R U? |
Tech833
Moderator
Username: Tech833
Post Number: 605
Registered: 8-2002
| | Posted on Tuesday, March 30, 2004 - 4:35 pm: |
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Here I am!
Tune and load both tune the final plate. Tuning is what resonates the plate while load is what 'loads' it. Plate is parallel tuning and load is series tuning, how's that?
Anyway, adjust the tune control for the lowest plate current and the load for the highest output. |
Legend
Junior Member
Username: Legend
Post Number: 25
Registered: 12-2002
| | Posted on Wednesday, March 31, 2004 - 2:15 am: |
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Quote:
"Anyway, adjust the tune control for the lowest plate current and the load for the highest output."
I hate to bother you again, but could you please let me know how to measure, or at least know when my plate current is as low as it's gonna get? Do I use the built in meter? I don't want to put anything else in line, because there will not be anything else in line when I am operating.
Do I tune for the lowest reading on the built in meter, and then go for the highest reading when I am adjusting the load, afterward? Do I adjust the load WITH, or without, modulation?
Sorry, but I am still not understanding. I think that you may be so advanced in your technical know how, that you might not relate with someone starting at ground zero.
Thanks again... |
Tech833
Moderator
Username: Tech833
Post Number: 609
Registered: 8-2002
| | Posted on Friday, April 02, 2004 - 3:02 pm: |
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Legend,
I do not know what the meter on the front of your amp is supposed to read. I would assume it is plate current. Can anyone else help with that?
Even though you may not want to leave a watt meter inline during normal operation, you STILL need to measure the output with a watt meter. You may remove the watt meter after tuning is complete if you wish.
Tune without audio. Carrier only. If you tune with high envelope audio, you are likely tuning to harmonics and splatter too.
See my response in the tech forum for a more detailed explanation of the proper tuning procedure. |
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