question about vpi 299d to Harry.

question about vpi 299d to Harry.

Postby yohimeys » Mon Mar 13, 2017 9:34 pm

HEY HARRY!! , I JUST BOUGHT ONE OF YOUR 299-D AMPS and im about to pee my pants bro... please tell me i can use my kt-120 or kt- 150 output tubes and not harm the amp or tubes? I also bought a used scout , upgraded to a scout 2 to match the amp, i already own a rogue audio cronus magnum w/ kt-120,s would love to be able to use those tubes on the vpi 299d. I am a big fan of you and hope i get a chance to shake your hand at AXPONA 2017 april 22 sat, in chicago, want to meet mat as well, i really appreciate you guys bringing forth wonderful toys that a working man can afford. j.e. yohimeys
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Re: question about vpi 299d to Harry.

Postby JimTimP » Fri Mar 17, 2017 9:04 am

My 2 cents worth.

They are electrically similar. It may work, but I wouldn't expect much additional power if any at all. That's a product of the amplifier power supply. If the current isn't there (since plate voltage specs are the same, I assume it'll be current), it won't output more watts. Well, maybe a few as the KT-120 might be slightly more efficient.

I would get a good pair of Golden Lions if it didn't come with them. My amp uses KT-88s and I love the G-L in it.

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Re: question about vpi 299d to Harry.

Postby Chupacabra » Sat Mar 18, 2017 5:21 pm

The amp isn't made to support 120's or 150's.

But if you want an authoritative answer, call Steve Leung on Monday. He's the guy who designed it, and his phone number's in your manual.
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Re: question about vpi 299d to Harry.

Postby Harry » Mon Mar 20, 2017 10:09 am

I absolutely love the 299D and when I finally retire will be using that as my primary source for music. The answer man on tubes is Steve, he spends more time rolling tubes and experimenting then I do so he could answer this question much better.

HW
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Re: question about vpi 299d to Harry.

Postby HI_fel50 » Fri Apr 13, 2018 3:57 pm

is philips 5R4GYS safe to use for rectifier?
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Re: question about vpi 299d to Harry.

Postby Harry » Sun Apr 15, 2018 3:20 pm

Checked with Steve and he said no problem using it.

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Re: question about vpi 299d to Harry.

Postby HI_fel50 » Sun Apr 15, 2018 5:26 pm

Harry wrote:Checked with Steve and he said no problem using it.

HW


Thank you Harry!!
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Re: question about vpi 299d to Harry.

Postby Brf » Mon Apr 16, 2018 7:34 am

HI_fel50 wrote:is philips 5R4GYS safe to use for rectifier?


Instead of trying a different make of rectifier, I would suggest swapping out the current production 5AR4 with a NOS Mullard 5AR4 / GZ34. I did this on my pre-amp and it made a huge difference.
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Re: question about vpi 299d to Harry.

Postby HI_fel50 » Mon Apr 16, 2018 6:17 pm

Thanks Brf! NOS mullard gz34 is coning..i ordered a coiple
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Re: question about vpi 299d to Harry.

Postby Brf » Mon Apr 16, 2018 7:06 pm

HI_fel50 wrote:Thanks Brf! NOS mullard gz34 is coning..i ordered a coiple


IME, the best 5AR5 rectifier. Although it’s slways nice to have a back up tube, the Mullard GZ34 tubes last forever. Let us know how they sound.
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