I'm not an expert on them, but all indications are that they're quite
stable in multiband designs given reasonable care in layout and
construction. I haven't as yet seen one require a parasitic suppressor,
for whatever that's worth.
73,
Jim, N7CXI
On 9/30/2010 12:00 PM, DAVE WHITE wrote:
> I've not come across that seller before. Does he mean $550 per tube?
> Also he's stated that you may not get the one in the advertisement, so
> although the picture is of a new looking one, you may get a blackened
> and half-melted dud in the worst case scenario - though I'd hope to have
> a bit more faith in human nature than that...
>
> Just Goolging to find out a bit more about that tube, I saw this
> http://www.directivesystems.com/YC156.htm
>
> ...which seems like a nice, neat bit of construction. 19dB gain from a
> triode? Strewth. Would that be a bit of a beast to hold down in a
> multiband amp?
>
> Price-wise, since I just paid GBP200 (about $280) each for a couple of
> new though rather old stock Eimac 3CX3000F7s I think $550 may be a
> little steep, though I've never bought a YC156 so don't really know.
> Still, it looks like one hell of a tube for the money
>
> Hope this helps.
>
> Oh, and "flame wars" ?? on this group? Ahem <cough> surely not....
>
> Dave G0OIL
>
> --- On *Thu, 30/9/10, Jim Barber /<audioguy@charter.net>/* wrote:
>
>
> From: Jim Barber <audioguy@charter.net>
> Subject: [Amps] Any experiences with "powergridtube"? (YC156 hunt)
> To: "AMPS" <amps@contesting.com>
> Date: Thursday, 30 September, 2010, 18:14
>
> I'm looking to buy a couple of YC156's for a project, either rebuilt
> or full-output pulls.
>
> There's a current eBay auction by "powergridtube" that lists 5 tubes
> "cleaned and laboratory tested to full output", although no specific
> guarantee is given. Any experiences with this guy? (replies off-list ok
> to save feelings and avoid flame wars)
>
>
> http://cgi.ebay.com/Tested-Eimac-YC156A-MRI-RF-Tube-/290481794913?pt=LH_DefaultDomain_0&hash=item43a2106f61
>
> <http://cgi.ebay.com/Tested-Eimac-YC156A-MRI-RF-Tube-/290481794913?pt=LH_DefaultDomain_0&hash=item43a2106f61>
>
> Thanks,
> Jim, N7CXI
>
>
>
>
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