Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: dpm309 on September 28, 2017, 07:33:18 pm

Title: Kay 803 Grounding
Post by: dpm309 on September 28, 2017, 07:33:18 pm

Want to add a 3-prong plug to a Kay 803 for safety reasons. Amp works fine with no issues. Ran into this discussion about the safety issues in a Kay 703 which is has a different circuit than the 803. http://el34world.com/Forum/index.php?topic=19072.msg195918#msg195918 (http://el34world.com/Forum/index.php?topic=19072.msg195918#msg195918)
Here is what I am planning on doing. Would this work?

Title: Re: Kay 803 Grounding
Post by: sluckey on September 28, 2017, 08:01:53 pm

Looks safe to me.

Title: Re: Kay 803 Grounding
Post by: dpm309 on September 28, 2017, 09:25:10 pm

Thanks Sluckey will proceed as planned. Wasn't sure after reading the discussion on the Kay 703.

Title: Re: Kay 803 Grounding
Post by: dpm309 on September 29, 2017, 10:18:06 am

Should the switch be connected to the hot lead instead of the neutral lead? Also would a 1 amp slo-blo fuse be sufficient?

Title: Re: Kay 803 Grounding
Post by: sluckey on September 29, 2017, 10:20:47 am

yes and yes

Title: Re: Kay 803 Grounding
Post by: dpm309 on September 29, 2017, 10:40:46 am

Thank you!

Title: Re: Kay 803 Grounding
Post by: ckilgore on October 04, 2017, 04:18:52 pm

Is no one concerned that this amp has line ac series heaters?

Title: Re: Kay 803 Grounding
Post by: PRR on October 04, 2017, 04:23:08 pm

> Is no one concerned...

I am, somewhat.

What is your concern? Safety? Yes, we are relying on heater insulation. I'm not keen on that, but it is unlikely to break down. Or tube life? Bah, who cares? These tubes ran OK in my kitchen radio.