Delta DBR-550 reviews

Brazilian made, around 1975 to 1985.
This transceiver operate in 80,40,20,15 and 10 meters: AM,SSB and CW.
It has an single conversion IF, and AGC output to S-meter do not correspond to "S" unit with calibrated generator signal applied to Rx.
In the receiver part, RF input amplifier do not have an good flatness response.
With two new 6KD6 in the final amplifier, the output measured with Bird 43 was 250 Watts (PEP).
The weight is about 22kg with power supply.
The power supply is too the speaker cabinet.
There are version with built in digital frequency counter.