Picture above shows some stages of development and construction of prototypes DB-1500 - TLA-143 is its old name of this model
There are seen variations on the front panel instrumentation arrow and also with LED matrices.
Since these are only initial steps in the development and construction of prototypes, please do not regard them highly critical ...
A video bellow to see and hear first settings and tests. As seen on LED anode current is not yet enabled for testimony.
There is visible radiated power forward - PWR-FWD, the remaining power back - PWR-REF depending on the ratio of standing waves - SWR. Also show current second grid and anode voltage ...
Used metal and glass lamp Tetrode: GU-43b.
When ordering this amplifier, the client receives an additional one lamp as a reserve - like a present...
Note : Available amplifiers not in stock - made only ordering. This is because these are not mass-produced amplifiers.