Those readings are only about 1% different, which is pretty good for these measurements. I've always had a difficult time getting finer measurements than 1% with non-laboratory instruments and especially with tube circuits.
I don't know how the biasrite measures, but you might double check where your reference points are for your DVM, that they are exactly exactly the same points that the bias rite is hitting.
I notice that much difference between my different meters sometimes. I wouldn't worry too much about it. One way to double check is to swap the bias rite sockets around and see if the voltage difference stays with the tubes or follows the sockets. If it follows the sockets, you can ignore it totally, since it is a measurement artifact.[This message was edited by Paul Arntson on 19 May 2005 at 10:37 PM.]
