Hovland HP100 service?

I have an old HP100 and it is doing the volume pops and terrible hum, the right channel wont work at all. Anyone know who can service this? Thanks
You can always send it to Bob Hovland in Los Angeles. Send PM for his email address.

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Thank you all. Phil, is the email from Steakster the right email?

Brf, I tried new tubes, no luck. I did some research and it appears that this was common on the older units with the black resistors on the volume control. I am getting tons of feedback and hum and one channel is completely out.
They may be Holco resistors. I know Holco's had issues with high voltages. They would become very noisy.
I own #1029 and have contacted the recommendations above because I too am having V-control noise.