![img_0626-tx-case-valve-box.jpg img_0626-tx-case-valve-box.jpg](thumb.img_0626-tx-case-valve-box.jpg) |
![thumb.img_0539-tx.jpg thumb.img_0539-tx.jpg](thumb.img_0539-tx.jpg) |
![thumb.img_0540-tx.jpg thumb.img_0540-tx.jpg](thumb.img_0540-tx.jpg) |
It
is still amazing that you can still purchase bottles in original boxes
at hamfests. The interior of the box lists hundreds of patent numbers |
|
|
![thumb.img_0541-tx.jpg thumb.img_0541-tx.jpg](thumb.img_0541-tx.jpg) |
![thumb.img_0542-tx.jpg thumb.img_0542-tx.jpg](thumb.img_0542-tx.jpg) |
![thumb.img_0543tx.jpg thumb.img_0543tx.jpg](thumb.img_0543tx.jpg) |
now , will all the decks fit. The
chassis that loomed so large now reveals itself to be undersized. This chassis was once an ISEP frame that I found in the dump. |
Brass shim stock is attached to the valve deck plate to provide a solderable surface. Many bypass caps need a positive earth |
I do my metal work outdoors. no fumes, no mess,
no dust ! |
![thumb.img_0587-tx.jpg thumb.img_0587-tx.jpg](thumb.img_0587-tx.jpg) |
![thumb.img_0588-tx.jpg thumb.img_0588-tx.jpg](thumb.img_0588-tx.jpg) |
![thumb.img_0590-tx.jpg thumb.img_0590-tx.jpg](thumb.img_0590-tx.jpg) |
|
|
|
![thumb.img_0594-tx.jpg thumb.img_0594-tx.jpg](thumb.img_0594-tx.jpg) |
![thumb.img_0596-tx.jpg thumb.img_0596-tx.jpg](thumb.img_0596-tx.jpg) |
![thumb.img_0600-tx-tank-deck.jpg thumb.img_0600-tx-tank-deck.jpg](thumb.img_0600-tx-tank-deck.jpg) |
silver
plated teflon coax offcuts are used as flexible wide diameter RF
conductors. They are heat resistant and flexible. |
![thumb.img_0601-tx-tank.jpg thumb.img_0601-tx-tank.jpg](thumb.img_0601-tx-tank.jpg) |
![thumb.img_0602-tx-tank.jpg thumb.img_0602-tx-tank.jpg](thumb.img_0602-tx-tank.jpg) |
![thumb.img_0603-tx-tank.jpg thumb.img_0603-tx-tank.jpg](thumb.img_0603-tx-tank.jpg) |
|
Anode
tuning deck is completed. Anode tuning capacitor shaft is posively
grounded to take the dodgy wiper effectively out of circuit |
Vortex coil is mechanically stabiliese with these
fibre glass rods and held together with expoxy resin |
![thumb.img_0604-tx-tank-deck.jpg thumb.img_0604-tx-tank-deck.jpg](thumb.img_0604-tx-tank-deck.jpg) |
![thumb.img_0605-tx-tank.jpg thumb.img_0605-tx-tank.jpg](thumb.img_0605-tx-tank.jpg) |
![thumb.img_0606-tx-tank.jpg thumb.img_0606-tx-tank.jpg](thumb.img_0606-tx-tank.jpg) |
Anode tuning deck is completed |
Anode DC isolation and RF coupling |
|
![thumb.img_0607-tx-tank.jpg thumb.img_0607-tx-tank.jpg](thumb.img_0607-tx-tank.jpg) |
![thumb.img_0608-tx-tank.jpg thumb.img_0608-tx-tank.jpg](thumb.img_0608-tx-tank.jpg) |
![thumb.img_0622-tx.jpg thumb.img_0622-tx.jpg](thumb.img_0622-tx.jpg) |
Anode RF choke. This is a trial of a
conical inductor for choke service at HF. |
the anode tuning shafts are insulated from front
panel |
valve deck construction permits verification of
6CM5 filaments. My stock of bottles light up. Filaments draw about
10Amperes in total |
![thumb.img_0623-tx-case.jpg thumb.img_0623-tx-case.jpg](thumb.img_0623-tx-case.jpg) |
![thumb.img_0624-tx-case.jpg thumb.img_0624-tx-case.jpg](thumb.img_0624-tx-case.jpg) |
![thumb.img_0625-tx-case.jpg thumb.img_0625-tx-case.jpg](thumb.img_0625-tx-case.jpg) |
|
|
the 6CM5 fits the metal work |
![thumb.img_0627-tx.jpg thumb.img_0627-tx.jpg](thumb.img_0627-tx.jpg) |
![thumb.img_0628-tx.jpg thumb.img_0628-tx.jpg](thumb.img_0628-tx.jpg) |
![thumb.img_0629-tx.jpg thumb.img_0629-tx.jpg](thumb.img_0629-tx.jpg) |
|
|
|
![thumb.img_0630-tx.jpg thumb.img_0630-tx.jpg](thumb.img_0630-tx.jpg) |
![thumb.img_0631-tx.jpg thumb.img_0631-tx.jpg](thumb.img_0631-tx.jpg) |
![thumb.img_0655-tx.jpg thumb.img_0655-tx.jpg](thumb.img_0655-tx.jpg) |
input TR control deck, grid 1 control |
|
rear
panel fan pressurises the chassis. There is also a purpose fan to cool
the valves. The other port is a passive hot gas exit port.
A fan should never be compelled to SUCK hot exhaust
gas, it
will have a very short life. |
|
![thumb.img_0657-tx.jpg thumb.img_0657-tx.jpg](thumb.img_0657-tx.jpg) |
![thumb.img_0658-tx.jpg thumb.img_0658-tx.jpg](thumb.img_0658-tx.jpg) |
|
cutting big holes for the meters. They
ever seem to line up ! |
this deck will control grid 1 input and bias with
input TR relay, metering and sampling |
![thumb.img_0656-tx-cone-manderel.jpg thumb.img_0656-tx-cone-manderel.jpg](thumb.img_0656-tx-cone-manderel.jpg) |
![thumb.imgp8351-linear-cone-coil.jpg](thumb.imgp8351-linear-cone-coil.jpg) |
|
vortex coil
mandrel |
vortex coil
mandrel with coil ! I ran out of wire before running out of mandrel |
|
![thumb.img_0689-tx.jpg thumb.img_0689-tx.jpg](thumb.img_0689-tx.jpg) |
![thumb.img_0690-tx.jpg thumb.img_0690-tx.jpg](thumb.img_0690-tx.jpg) |
![thumb.img_0691-tx.jpg thumb.img_0691-tx.jpg](thumb.img_0691-tx.jpg) |
front panel is
taking shape. meters are for total anode current, and all indivdual
kathode currents and all screen grid voltages and a general
multimeter. |
12V psu
utility and fan supply and grid bias control deck pots, 24V relay power. I am
still designing the grid 2 bias regulator & control supply. Its harder than you think. |
EHV rectifier
with 3A diodes and bleeder resistors. They are ceramic metal
film and should have a long service life. |
![thumb.img_0692-tx.jpg thumb.img_0692-tx.jpg](thumb.img_0692-tx.jpg) |
![thumb.img_0693-tx.jpg thumb.img_0693-tx.jpg](thumb.img_0693-tx.jpg) |
![thumb.img_0700-tx.jpg thumb.img_0700-tx.jpg](thumb.img_0700-tx.jpg) |
EHV rectifier
and HV capacitor stack |
EHV rectifier
and HV capacitor stack |
12DC psu
and EHT transformer . the remaining gap will be filled in
with the grid2 bias deck |
![thumb.img_0702-tx.jpg thumb.img_0702-tx.jpg](thumb.img_0702-tx.jpg) |
![thumb.img_0703-tx.jpg thumb.img_0703-tx.jpg](thumb.img_0703-tx.jpg) |
![thumb.img_0704-tx.jpg thumb.img_0704-tx.jpg](thumb.img_0704-tx.jpg) |
gaze
into the Vortex |
input circuit
and TR relay controls EHV anode mercury relay and EHV recifier |
Anode deck and
valve deck |
![thumb.img_0725-hflinear.jpg thumb.img_0725-hflinear.jpg](thumb.img_0725-hflinear.jpg) |
![thumb.img_0726-hflinear.jpg thumb.img_0726-hflinear.jpg](thumb.img_0726-hflinear.jpg) |
![thumb.img_0727-hflinear.jpg thumb.img_0727-hflinear.jpg](thumb.img_0727-hflinear.jpg) |
under the chassis, access to the valve sockets and valve deck components | | |
![thumb.img_0728-hflinear.jpg thumb.img_0728-hflinear.jpg](thumb.img_0728-hflinear.jpg) |
![thumb.notes-linear-hf-anodes0001.jpeg thumb.notes-linear-hf-anodes0001.jpeg](thumb.notes-linear-hf-anodes0001.jpeg) |
![thumb.notes-linear-hf-anodes.jpeg thumb.notes-linear-hf-anodes.jpeg](thumb.notes-linear-hf-anodes.jpeg) |
showing here, EHT anode relay, input grid1 deck and filament inrush delay resistor | vortex inductor anode tank design | 6CM5 linear amp unit cell. There are 8 of these in parallel |
| | |
| | |