Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => AmpTools/Tech Tips => Topic started by: markvalluzzi on July 22, 2012, 06:58:02 am

Title: Power up after long sleep
Post by: markvalluzzi on July 22, 2012, 06:58:02 am

  I wasn't sure what heading to post this under....  I have a Fender Concert. Built around 1983. The one that they call the Rivera period.  I have heard many different opinions on this subject and am looking for more. This amp has not been started in over 15 years. Some people say that I can just plug it in and power it up at line voltage other say no.  I do have a variac. What say you ? ? ?

Title: Re: Power up after long sleep
Post by: kagliostro on July 22, 2012, 04:58:36 pm

If you haven't a Variac you can use a transformer (or an autotransformer) to give the amp 1/2 the usual voltage for some time (1/2 an our at least)

at the same time use a lamp limiter

if all is OK use only the lamp limiter

http://antiqueradio.org/dimbulb.htm (http://antiqueradio.org/dimbulb.htm)

"Poor Man's Variac" A current limiter for testing electronics. (http://www.youtube.com/watch?v=-rHmuPS--P8#)

K

Title: Re: Power up after long sleep
Post by: markvalluzzi on July 22, 2012, 05:59:56 pm

   Thank you Kagliostro. That video is very informative. I'll share that info. with my friends