![]() The bandswitch is arranged so that the first crystal in the bank of six is mixed with the four crystals in succession so that at initiation that would give channels 1 to 4. The typical crystal synthesizers uses two banks of crystals arranged in a bank of four and bank of six arrays. With crystals that raised the possibly to utilize commonly available inexpensive Computer Crystals to move the frequency to 10 Meters. After digesting those inputs I chose to look at the 23 Channel units since many of these radios use Crystal Synthesizers. I received many helpful inputs and suggestions. If not for that old chip I would not have noticed those pins.Īlso glad I did not go down that rabbit hole.Untitled Document Conversion of SSB CB Radios to 10 Meter QRP OperationĮarly in 2009 I posted an inquiry on the QRP-L Reflector about any and all that may have converted SSB CB Radios to 10 Meters. Radio fired right up and everything functioned. I removed the socket, put the CPU back in and made sure to flow the top/bottom of those 3 pins well. Someone had pulled them out of the board when he removed it. Then I started looking at the cpu in the box and I could actually see 3 pins that still had the tiny through hole sleeve soldered to the pin. Pull the cover off and there is a socket installed but no chipswitch. Got to the car, opened the chipswitch box to find the stock 2600 cpu. I opened the box to look at the radio, its clean and then I see there is a black ChipSwitch box in the bag with the mic/mounting bracket and power cord. He says it is a CB, he did not know anything about it and he would take $25. The guy had a bunch of random electronics and in the mix i see this old hr2600 box. I snagged a hr 2600 one time for cheap at the flea market. You have to be careful with those double sided boards when replacing parts. I had it already, so I zipped it all up and attached it here in the hopes that it might have one or several pieces of a solution for you! as I tried to read the service manual there and it said that the file could not be found. I have tried to attach a ZIP of a folder of all of the CBTRICKS content. A good magnifying hood or glasses may also be your friend here. They are grainy and don't "expand" well when you expand a snippet. Unfortunately, the PC board images in the SAMS leave a little to be desired. and using those CircuitTrace numbers to your advantage. I think that, in this case, your best friend is going to be the SAMS. but that depends on how the PC board is laid out and how the pass throughs are located. the more "lower level" supplies may also be dead. The "higher up in the level" that the failure is occurring. which may lead you to find the pass through that is bad. it MAY help you find out the "topmost level" of the PC board traces that are not working. (which are working and which are not) and examine it against the SAMS power supply. IT may feed OTHER sections and they will also be down. That may help lead you to isolate a certain section of the PC board trace that SHOULD be powered but isn't. and scour the radio, section by section, with a DMM and see where each "supply circuit IS and ISN'T". take EACH supply by the SAMS "Circuit Trace" number. If you really want to save it, I am thinking that you may need to focus on the DC power supply page in the SAMS. ![]() I just looked in the SAMS for the 1000M and there is no such drawing there (same in the SBE the SAMS did not have that nice pic!). SBE had the same thing on my ConsoleV and the SBE service manual had one particular PC board drawing that had each and every pass through marked. which means we are probably looking at a PC board "pass through" issue. the main power rail is "up in some places" and "not up in others". and we KNOW that those won't work UNLESS the main power rail is up. ![]() ![]() the mode switch lights AND the meter lights ALL come right straight off of the switch. If you take a look at the schematic section. This is likely to be EXACTLY what Nomad says and here is why I think so. so I hope the image I attached comes through. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |