[Amps] GS-35b Amplifier

[Alek Petkovic]

Hello Nuno.

I think you can do much better with the socket. You can get one where 
you simply plug the tube in. No rings, clamps or screws.

Look at
http://www.ebay.com.au/itm/NEW-GS35B-GS31B-A-Tube-socket-/271332992117?pt=US_Radio_Comm_Tubes&hash=item3f2cb4e475

Have a look at his other sockets as well. All of them are superb quality.

73, Alek
VK6APK

On 29/11/2013 6:08 PM, Nuno Lopes wrote:
> Hi all,
>
> This will be my first big project like this, I'm in the beginning of start
> my first project with an amplifier, and have some questions.
>
> I'll start from the Anode tank first then working around that, I'm thinking
> to make an tank like this one (
> http://home.earthlink.net/~wd7s/images/photo2a.jpg ) with the
> dimensions 7.874" Wide by 11.81" Deep, the tube will be 1.97" from each
> side and back of the tank, will there be any problem with that?
>
> I'll use an similar socket to W4ZT made by me, very close to this one (
> http://www.pa3gcv.nl/Equipment/gs35b/imageframe.html?5.jpg ) except that
> the plate where the grid ring will rest will be 0.393" thick aluminum, and
> the side bars will be 0.393"  thick to, that will give good ground, I think?
>
> The blower will be put in the filament compartment blowing air thru the
> socket up to the Anode and to the tank, according to this table (
> http://gs35b.com/gs35b/index.html ) the required is 88.3CFM minimum and
> with this table ( http://www.realhamradio.com/GS35B_Amp_Page.htm ) Anode
> required 88.3CFM, Cathode 1.8CFM, and Grid 10.6CFM, so the total of all the
> tube will be around 120CFM, I thinking for blower to use one Airflow 45CTL
> that has 80 L/s ( 169.50CFM ) at 70Pa (Pascal) static back pressure, or
> the 52BTXL that has 100 L/s (212CFM) at 150Pa or (237.50CFM) at the same
> 70Pa, the datasheet is here (
> https://www.airflow.com/productdetail_/pg_SA00/71655702F )just download the
> PDF, will one of this be enough?
> I think for now it's just this.
>
>

-- 
http://www.qrz.com/db/vk6apk
http://www.qrz.com/db/vk6ap

Family Businesses:
Petkovic Air&  Gas.  petkovicag at bigpond.com
SP Electrical. www.spelectrical.net.au
Hampers by Hand. www.facebook.com/hampersbyhand