[Amps] QB3-300 Amplifier

[Alek Petkovic]

Yep, I'll second that. I built a sinfully ugly, cheap and indestructible 
amp with a pair in GG. Still working as good as ever 15 years on with the 
original tubes.

73, Alek.
VK6APK

At 07:54 PM 28/10/2004, Peter Frenning, OZ1PIF wrote:
>These tubes work very well in GG, see my FL2000 conversion on my homepage 
>below..
>(They are low power relatives of the QB3,5/750 and QB4/1100 etc)
>
>Vy 73 de OZ1PIF, Peter
>
>**********  OZ1PIF **************
>email: oz1pif(no-spam-filler)@privat.dk
>http://home24.inet.tele.dk/oz1pif/
>Ph. +45 4619 3239
>Snailmail:
>Peter Frenning
>Ternevej 23
>DK-4130 Viby Sj.
>Denmark
>***********************************
>----- Original Message ----- From: "Alberto" <re349 at yahoo.com>
>To: <amps at contesting.com>
>Sent: Thursday, October 28, 2004 1:44 PM
>Subject: [Amps] QB3-300 Amplifier
>
>
>>Hello!
>>
>>Recently, i got some spare QB3-300 tubes (equivalent
>>SRS455, 6155, 4-125), so I´m planning a new SSB
>>amplifier using them. I've seen lots of configurations
>>for these tubes in PA operation. Watching tube
>>datasheet, it seems like grid driven class B operation
>>would work: Va=2500V; Vg2=350V; Vg1=-40V aprox.
>>
>>Some PA builders say also g-g configuration would
>>work; that is grid and screen connected and grounded
>>together. (I don't think so)
>>
>>I'd like to know the usual ratings for amateur SSB
>>operation. Has anybody experience using QB3-300 in PA?
>>
>>Thanks!
>>Alberto
>>EA4PL
>>
>>
>>
>>__________________________________
>>Do you Yahoo!?
>>Yahoo! Mail - Helps protect you from nasty viruses.
>>http://promotions.yahoo.com/new_mail
>>_______________________________________________
>>Amps mailing list
>>Amps at contesting.com
>>http://lists.contesting.com/mailman/listinfo/amps
>
>
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps

http://www.qrz.com/vk6apk
http://profiles.yahoo.com/vk6apk