Home |
Search |
Today's Posts |
#11
![]() |
|||
|
|||
![]()
My point was that the art of homebrewing loses something when it's reduced
to just plugging in a chip. Seems like everyone is ignoring how the circuits work and taking the 'black-box' approach instead. I can agree with you, but only up to a point, but do you never think that "them there chips" can possibly be used as a tool? A component? A lot depends upon where you draw that line between what you call homebrew and black-box. Do you not think that an Operational Amplifier, like the UA741, is a component? or would you rather use a slack-handfull of transistors every time you need an Operational amplifier. I personally put the prescaler chip in the same category as the OpAmp. ... where's the fun in just hooking up power to a chip? That's not homebrewing, at least not in my book. I get a great kick out of using CMOS and TTL chips. For example, one CD4007 can be used to build a complete superhet receiver. If I want a VHF synthesiser then I have absolutely no hesitation to using a couple of CD4000 chips and a prescaler. Logic, to me, is also homebrew. As I said before, it all depends upon where you draw the line. Try a simple flip-flop. Two transistors, that's all. There are probably a few dozen schematics on the net and dozens more at the public library (you do have public libraries in Sweden, don't you?). I didn't have to search for a circuit, but using simple transistors I have a circuit that is stable, but only up to about 95MHz. Here in Sweden, the ONLY non-power RF transistor I can find in Sweden is the 2N2369 (NPN) and it is that transistor that has increased the operating freq. of my stage to 96MHz. I have also tried just a simple schmitt trigger circuit and again, about 100MHz is the top limit for conventional transistors. Anyway, I am still having fun on the workbench and I will continue to do so. When I don't I will probably join all the others who are sick of radio and homebrew and get on the Internet. Prabably even subscribe to a hamradio newsgroup, such as "rec.radio.amateur.homebrew" and maybe even communicate with othere without the QRM. Best regards - Harry (SM0VPO) (If it feels good - do it!) |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
suggestions for a limited space HF antenna.. vertical or dipole | Antenna | |||
suggestions for a limited space HF antenna.. vertical or dipole | Antenna | |||
Good Moble HF Antenna - Suggestions / Comments? | Antenna | |||
Cell & VHF/UHF antenna suggestions for fiberglass RVAntenna | Antenna | |||
Antenna Suggestions | Boatanchors |