Strange Artifacts....

[zozoe]

G'mornin' all~ What you see here is my new old 1973 Davis Model 106 PA amp, that under the hood sits a pair of EL84's, a 6EU7 & a 6CA4 recto,,, and this amp is no firecracker, but more like an friggin' M-80!!,,, 1 Mic. Volume, that middle 'Music' Volume for the audio RCA jacks in the back, & a Tone control, that could use a value change of sorts to let the amp breath a bit better, & brighten things up a tad... BUT when I had the chance to take it for a full out test-ride, besides it's awesome o/d, what at 1st sounded to be just a dirty, noisy volume pot on the guitar, proved to be happening on all 4 guitars I tried (all tone controls were unaffected), and was clearly evident along the almost full sweep of the pot,,, Regardless of the amp's volume, from 0 to 1, and from 9 to 10 on all the guitars, were dead silent,, but along the whole remaining sweep, from 1 to 9, it was real bad,,, again, only on every guitar's Vol pots...
Lastly, when I'm plugged into the main MIC input, that middle AUX vol. control seems to add a bit of (pleasing) hair when I turn it up from 8 to 10,,, Only it's own, that AUX volume does nothing... I LOVE this amp, but it's got some strange stuff going only... Thanks in advance for your attention & expertise. Kenny ॐ

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[brewdude]

I love the head cab

[johnnyreece]

You might check to see if you have some DC leaking to your input.