Recent content by tramd

Also, a sniffer probe is a good thing to have. It can be used to read a signal without direct contact. A direct connection can sometimes pull the signal down a bit and give you an incorrect frequency reading. If the sniffer probe it is insulated, you won't have to worry about touching something...

I doubt you will get a reply. His last post on this group was in Feb. 2012.

The Tram Titans like a few other DSBSC radios transmitted on both sidebands at the same time, so their output was divided between the two. Wasn't much better than AM.

That's a later model, as it has fixed bias for the audio tube. The yellow cap, blue thumb wheel, electrolytic cap and a few resistors on the audio board are the giveaway. The D201A doesn't use the "B" side of those two tubes to control the meter like the 23 channel radios did. It uses a UA741TC...

I'm a little late to the party, but I had the same problem with one of those I worked on. The crystal was off-frequency when I measured it and had to replace it. Was all good after that.

Being a 40 channel radio, they were from 1977 and later.

Sounds like the LSB crystal is out of tolerance and the trimmer can't bring it onto the correct frequency. I've seen that quite a few times in those 858 PLL radios. They are 45 or 46 years old now.

The leg is missing because it's not needed. The leg and the metal tab of the transistor are connected, so there is no need for the leg. This is used as the regulator for the 14 vdc circuits. If you measure about 14.2 vdc on the output of that part which is the emitter, it is okay. The emitter is...

Here is a diagram from the circuit board D201manual. The board is the same as the vox radio's board, except the vox board used round sockets and pins and the later D201 and D201A used square ones. The diagram clearly shows the orientation of the caps.

Do you have a manual or schematic for it? If not, you can download them here: https://web.archive.org/web/20210302170832/http://cbtricks.com/radios/tram/d201a/index.htm. There are board diagrams in the manual that will help you identify the parts. Looks as though most of the resistors that...

I've done that many times over the years for people. They just have to realize they won't have channel 39. Only 36,37,38,and 40 unless they want to somehow add the extra 4 MHz crystal that the 40 channel radio has.

Here's a NY Times article from 4/28/1983, the day the FCC ended CB licensing. https://www.nytimes.com/1983/04/28/us/fading-cb-craze-signals-end-to-licensing.html

In the 60s, Wolfman Jack from the "X" just over the border from Del Rio.

This may help you. Many I have worked on just need new gears.

I have that problem here in NYS. NY bans all kinds of stuff from being shipped in, so I just use a friend's address over the border in PA and have it shipped there.