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tkemmett wrote:Is the VTA 120 best operated at reduced line voltage (110-117) rather than the 124-126 I measure at the the outlet? I have read that tube life and sonics are improved with reduced voltage in a lot of tube gear.
sKiZo wrote:Probably goes without saying, but ditto with a bucker. The transformer I used is rated at six amps with a 120 primary and 6.3 secondary winding.
Don't quote me, but I believe it originally came out of an Eico something or other.
tkemmett wrote:What are the pro's and con's of using either a variac or bucker to lower voltage?
Bob Latino wrote:tkemmett wrote:What are the pro's and con's of using either a variac or bucker to lower voltage?
With a variac you can dial your line voltage up or down and set it anywhere you want between 0 and 140 volts (in 120 volt counties) For a tube amp you want to set it at maybe 115 - 118 VAC. The voltage drop in the bucking transformer can be altered somewhat as sKiZo has said by changing the connection hookups. The variac adjusts voltage much easier - you just turn the dial up or down.
corndog71 wrote:I live on the north side of Chicago and get a fairly steady 125VAC. I remember getting a solid 120VAC in one of the suburbs bordering the city.