Ok What's the exact procedure for finding the ..'1db compression point' on a HF amp ?? I have conflicting info on the procedure. With hardly any drive, the typ HF amp has a lot of gain. As drive leve
Hi Jim, I think the easiest way is to tune and load for maximum output, then reduce drive to find the power output at the compression point by reducing the drive level and retuning to maximum output
The starting point can be wherever you want, as long as its on the linear slope. With a big amp its better to start close to the design load so you dont have to keep retuning. Work your way up noting
I don't think you want to be anywhere close to the 1-db compression point, as the 3rd and 5th order crapola will come way up before that... Tony K1KP _______________________________________________ A
True, but it helps to know where it is if youre doing a performance graph. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/
How to know when you have reached the 1 db compression point! Find a qso with both stations having strong signals. QSY about 20 kHz away and put your station on the air with a test and whistling ofte
...Point is, the 1dB compression point can be 5-10 dB below our usual operating conditions. it has more to do with low level amplifiers than with high power ones. low level amplifiers have to cope wi
Celluar amps operate over a multi channel bandwidth with many signals as do CATV line amps and your typical rice box transceiver receiver section. A linear transmitting amp for hams is not dealing wi
The gain should first be measured with low-level signals (mW range). Then find where the gain has falled by 1 dB. That probably will give you a figure well below what you want to to use, but that is
.... or the very high peak to average ratios of multi-carrier digital signals. 73, ... Joe, W4TV _______________________________________________ Amps mailing list Amps@contesting.com http://lists.co
The 1 db compression point is usually concerned with input power to an amplifier. Usually a receiver front end or preamp. You usually want to know how big of an input signal the amp will handle befor
It is useful to tell what your amp tubes are really capable of. For example a pair of 572B's will start compressing at 75-80W altho they are rated at 50W drive each. OTOH a pair of 3-500's wont be co