| Author |
Message |
    
River Rat
| | Posted on Monday, November 12, 2001 - 2:48 pm: | 
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Hello, I realize this will sound like a stupid question but can anyone tell me the correct procedure for tuning and loading of a ten tube D&A???I can't find the manual for it.It appears to be two 6lq6's driving eight.Any info would be greatly appreciated.Thanx Da Rat |
dave
| | Posted on Tuesday, November 13, 2001 - 7:02 pm: |
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hold keyed up adjust load to highest wattage on your meter then do the same with the tune |
Vernonott
| | Posted on Tuesday, November 13, 2001 - 8:06 pm: |
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dave :I ran the old D&A's for many years and I used to audio into the mike while I tuned just as you have said.I've since been told that you shouldn't do what I use to do but I did it to get more watts out of it and it didn't appear to hurt the unit although it may have reduced tube life. |
025
| | Posted on Tuesday, November 13, 2001 - 11:00 pm: |
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Tune bottom adjustment knobs (driver, driver tune) to peak, tune top adjustment knobs (plate,tune) to peak. Then re-adjust plate and tune for peak with modulation. Do not hold key down for longer than 5 seconds while tuning. This amp is low drive, 4 watt max. Ron |
River Rat
| | Posted on Wednesday, November 14, 2001 - 2:53 pm: |
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Thanx guys especially 025 that was exactly what I was looking for. I haven't ran her yet still waiting for my antenna.
Thanx 'Da Rat |
Tombstone
| | Posted on Saturday, December 28, 2002 - 4:38 am: |
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A little known procedure is to "overcouple". After loading and tuning the amp as described, turn the LOAD control slightly clockwise until you see a slight drop in wattage. (only a couple of watts) Also, if you have a mic gain control on the radio, tune and load the amp for highest wattage with the modulation turned off. These methods will result in extremely clear transmissions. Be sure to only run about 80%modulation; any more only results in dirty sounding audio. I hope this helps you!
Tombstone/Richards Electronics |
Tech833
| | Posted on Saturday, December 28, 2002 - 8:13 pm: |
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For maximum tube life, tune the plate tune control for lowest plate current, then the loading control for the amount of power you want. Then, finish up by retuning the plate tune for minimum plate current. |
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