--- In [email protected], "Bill Meahan K8QN" <[EMAIL PROTECTED]> wrote: > > > NOTE: 7360's were developed for military applications while 6AR8's > were intended for consumer applications. Both feature two plates and > beam-controls that allow switching the electron flow (once it has > passed through the grid and the screen) to be switched between the > plates based on an external signal. Usual mixer operation is to feed > the RF signal to the grid and the LO signal through a transformer to > the beam-control electrodes and take the output from the two plates > via another transformer. The tube is thus working as a switching-mode > mixer rather like many "modern" topologies. > > > BTW 7360 data is in the Transmitting Tube Handbook while 6AR8 data is > in the more-familiar Receiving Tube Handbook. Note that 7360's are a > lot more scarce and expensive than 6AR8's. > > 73 de K8QN >
The 6JH8 is more or less electrically equivalent to the 7360, only the pinout is different. These were used in the old SWAN 250C (and relatives) rig. See http://members.shaw.ca/pacifictv/cartridg.htm for some details on substituting one for another. It looks like the 6JH8 can be had for about $8 these days... -Ray WB6TPU
