Amen, Steve. Not a guess. The airflow in feet/minute is typically higher with transverse cooling. That, plus the upward airflow is more restricted. and a simple aerodynamic principal. - Rich..., 805
Would the fins on the anode/plate radiator work better with vertical airflow or horizontal airflow? - Henry Radio, Co. uses glass chimneys with noisy centrifugal blowers. I too scoffed at Heath's co
The fins extend horizontalally. If the fins extended vertically, they could short against the top cover to the rf deck in many amplifiers. With an air-system socket + chimney, the air is preheated b
I have run into several such cases so far on the Internet with one person pretending to be several. In two of these cases, the imposter also had a group of faithful supporters who testified as to th
ALC does not work as advertised. The Kenwood relay-control pin connections are given in the first diagram in: http://www.vcnet.com/measures/440.html The 930's switch-transistor will handle the relay
Stories of "gas" and "barnacle"/Rocky Point-effect arcs have not been supported by autopsy evidence of kaput 3-500Zs. A seemingly more plausible analysis is that the valve's/tube's 0.15pF feedback C
Amen, Karl-Arne. Eimac seemingly began a long slide downhill after it was acquired by Varian. The sweetheart monopoly contract Eimac/Varian signed with Eddie Richardson was a good clue that something
** Last week, I received several e-mails and telephone calls from a CBer who was constructing a 3cx15,000A7 AB2 g-g amp. using a 3kV anode supply. He was having problems getting it to work properly,
I get jammed regularly on 7255kHz by Hams. Some Hams run tetrode with handles amplifiers in contests and have no qualms about signing the FCC rules compliance statement on the contest entry form. I
** Good idea, Steve. However, with some values, a roller-L will be needed to cancel XC in order to make the load look like 50 +/- jO ohms. - Rich..., 805.386.3734, www.vcnet.com/measures.
The main difference between RF doorknob caps and DC-PS doorknob caps is thread size. RF-rated caps have larger threads. - Rich..., 805.386.3734, www.vcnet.com/measures.
T2 is usually destroyed by a tube that shorts from the grid to the filament/cathode. When a short occurs, the +110VDC relay power supply shorts to ground and the unfused transformer becomes toast du
To begin to calculate metering circuitry, one needs to measure the full-scale mV-drop across the meter movement as well as the full-scale current. For example, a 1mA meter indicates 57mV and 1.04mA
** There could still be a safety hazard on the chassis of the amp if the neutral and the ground wires were to break at the same time. Perhaps it would be wise to go with a 5-wire circuit ? There wou