FWIW I have been running a pair of RF Parts matched 3-500's for 7 years in an
SB220 converted to 6m without any issues. They still have full output.
Jim
W7OUU
----- Original Message -----
From: "Alek Petkovic" <vk6apk@bigpond.com>
To: "AMPS" <amps@contesting.com>
Sent: Monday, July 24, 2017 11:22:04 PM
Subject: Re: [Amps] Machlett 3-500z
Yep. There is nothing wrong with any of the 3-500ZG tubes. If you buy
enough of them from the factory, they'll stamp whatever brand you like
on them.
They are as good as anyone else has ever made, with perhaps one proviso.
It is strongly advised to use them and get the anodes red, regularly.
Don't leave them unused in the amp or on the shelf. They'll go gassy and
create big problems.
Keep 'em gettered and they'll serve you well.
73, Alek.
VK6APK
On 25/07/2017 7:04 AM, Terry Hart wrote:
> Thanks Dennis. That's exactly the type of feedback I was looking for. Any
> further feedback on personal experiences would be very helpful.
> Best, Terry G3VFO
> ----- Original Message -----
> From: Dennis Kippa
> To: Terry Hart
> Sent: Monday, July 24, 2017 5:36 PM
> Subject: Re: [Amps] Machlett 3-500z
>
>
> I purchased 2 3-500gz from Mississippi and have had them in service for 5
> months. I drive the tubes with 90 watts from a Flex 3000 and I get 1500
> out. It will do MORE. I am happy with the purchase and the performance.
>
>
>
> On Sun, Jul 23, 2017 at 2:08 PM, Terry Hart<terry.hart@btinternet.com>
> wrote:
>
> I see from their website that RF parts will supply 3-500s only to
> customers within the CONUS area. That leaves the rest of us having to look
> elsewhere, so it would be useful to hear of the experiences, good or bad, of
> those who have bought these Machlett tubes 'direct'.
>
> Terry, G3VFO
>
>
> ----- Original Message ----- From: "Roger (K8RI)"<k8ri@rogerhalstead.com>
> To:<amps@contesting.com>
> Sent: Friday, July 21, 2017 10:33 AM
> Subject: Re: [Amps] Machlett 3-500z
>
>
>
>
> Warren, that price difference sounds about correct to me. RFParts
> tests and I believe, guarantees their tubes which are likely the same brand
> which they most likely purchase enough to receive a quantity discount.
>
> Purchasing direct often saves money. Sometimes it can be substantial
> because you are assuming the risk while the US reseller has the cost of the
> time and paperwork invested in testing tubes they may, or may not be able to
> return. With some NOS tubes there is substantial risk from "infant
> mortality". You are often safer paying more for the new tubes than less for
> the older NOS versions where both are available. Direct Vs through a US
> retailer? You are playing the odds and taking on the risk yourself Research
> the viability of the tubes before making your decision. Price differentials
> and risk can vary considerably.
>
> 73, Roger (K8RI)
>
>
>
> On 7/20/2017 Thursday 10:46 PM, Warren Volz wrote:
>
> Tonight while searching for 3-500z on eBay I discovered this
> listing: https://www.ebay.com/itm/222576972694
>
> I know all 'new' tubes are made in China and the rfparts version
> seems to get the best reviews. Any idea what the deal is with these Machlett
> 'factory direct' models? They are $90 less than rfparts. Are they the rejects
> from elsewhere or the manufacturer trying to undercut the market?
>
> -Warren KD5YPH
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> Dennis W5DPK
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