1939 -- The 60 watt National NTX-30 transmitter for the 80-10 meter
amateur bands. All circuits but the final plate were bandswitched by
means of the row of push buttons.
A rear view of the 80-10 meter National 600 transmitter. 100TH's in the
final and although a far cry from today's table-top rigs, the ultimate in
the late 30's. [Visible top to bottom in this picture are the final/buffer
chassis, NTE Exciter Unit and Speech Amplifier, Class B Modulator,
Low/Medium Voltage Power Supply and the Final Power Supply. Except for the
NTE Exciter/Speech amp, the National 600 transmitter was available as a
series of foundation units. National made available parts kits that
included a punched chassis and any National parts. The builder was
responsible for purchasing additional parts such as the meters, tubes and
transformers themselves. For the afluent ham the entire transmitter with
a pi-network coupler in the top section listed for $1727.50]
The final amplifier and buffer of the '600 -- every component except the
tubes manufactured by National.
A deluxe amateur station of the late '30's -- NC-101X receiver,
CRM 'scope, NTE exciter and the '600 transmitter. [In the version of the
'600 shown here the NTE exciter/speech amp has been moved from the rack to
the operating position and replaced with a second final amp/buffer.]