All
This is a test that Paul WB2SKC and I did quite a while ago. This was the spreadsheet I used to do the 30 watt power response of the Bogen M60 amp with the Hammond 1650P 60 watt HIFI output XFMR. The first sheet allows one to figure out the voltage needed to achieve the desired power output. The yellow fields are input fields. There are two sections one to allow for voltage input and calculating power. The other section works the calculation the other way. The Z input is entered on one place and works for either section.
For this test we used the second section, being sure to enter the Z in the first section. In this case it was 5000 ohms. The resultant voltage was shown to be ~382 volts -- enough voltage to drive the Eico 720 into +100% modulation.
Next, the Bogen M60 was connected to a power resistor of 5000 ohms. Note on the second sheet that the first input line (red field,cell C2) was entered for 1 KC at the proposed 30 watt level = 382 volts. Each frequency was presented to the input of the Bogen M60 using a laboratory signal generator and the voltage noted then entered into the proper field for each frequency. When finished the third sheet presented the Bogen M60 frequency response.
Hope this will be a useful tool. I've provided a link to my server because this forum (rightly) doesn't allow an XLS format file.
http://homepage.fcgnetworks.net/w1vtp/THD/POWER_RESPONSE_BOGEN_M60_&_HAMMOND_1650P.xlsRegards, Al
