Worldwide DX Amateur Radio Forums - Ham - CB - HF - VHF - UHF

Thanks Jeff for the contribution to the thread, and welcome to the forums.

This is the type of responce I am looking for here. And for your first post, that was a great idea.
When you are on a budget this type of supply comes in real handy. Old pc's can be picked up at yard sales for less than 10 bucks. And you can also use some of the low voltage outputs. Make them varible and then you have a source to inject missing voltage on a radio for testing puposes.

Thanks Jeff.

anytime. The power supplys are capable of producing voltages of 3.3 to 24vdc, just through normal pinouts, and i have seen some information on re-wiring them into a variable voltage power supply. They are handy little devices.

Something else i would like to add, is for those of us who do wiring diagrams, a good PC based program (that is free), is called TinyCAD, available freely from sourceforge (big freeware repository) at TinyCAD - The open-source schematic capture program for Windows

Here is the link to some other Schematic and design simulation software that has a really good Yahoo support group with Lots of additional parts libraries. The Yahoo support group has links to instructional videos as well.

Linear Technology - Design Simulation and Device Models

LTspice : LTspice/SwitcherCAD III

Linear Technology primarily makes chips for Cell phone power supplies and switching power supplies but also has complete transceivers on a chip in the cell bands. Amazing technology but not really applicable to CB.

I have some old dead Uniden 510's I might have to resurrect. It would be neat if we could get a schematic of the old Sencor CB test sets and try to duplicate them. Over on CB tricks there was a suggestion by Mr.Ward that starting with a dead Galaxy 99 or any SSB radio with a freq counter would be a starting point. Not quite enough resolution on the counter though. Older lower than 100 MHz HP counters go for less than $100 on eBay pretty often. 7 digit resolution there.

I was thinking of just getting the 510's to output a carrier at a low enough level to feed into a SA602 or 612 which is a common active mixer in SSB radios. Would have to unbalance it to reinsert the carrier. I will use the schematic of my 2510 as a starting point since it has an adjustable carrier level. I guess any low level modulation circuit would be a good start. Maybe even a diode ring mixer since the loss through one is usually around 6db and would help attenuate the signal. Look at some of the older Ten Tec schematics from the Omni A or Titan radios from the late 70's and early 80's for reproducible circuits. Schematics are in the manuals. They made amps as well.

Ten-Tec: Downloads

Here is a really good read as well, all 100% homebrew, and very clear and easy to understand.

CRYSTAL SETS TO SIDEBAND

A Guide to Building an Amateur Radio Station
By Frank W. Harris, KØIYE

download it here for free

Book Copyright (c) 2006, Frank W. Harris / HTML and PDF assembly Copyright (c) 2006 AmSoft

I'll have to make do with my basic items till the day comes and I can get a
HP 8920 or 8924c. I did score a Tektronix 2230 scope for less than $80 a couple years ago. Still need a decent counter but until I get back full time it will have to wait. Either that or go back OTR, but then I won't have any time for learning radio. Making it driving a forklift at a LTL company now till they add drivers or some land I own sells and I go back to school. Ordered my transcripts to see where I stand in that regard.

I love this topic. Make it a Sticky if it isn't already.
Thanks,
Hypo