Moving an old CB walkie-talkie to 29 MHz AM

Hey all, after a serious long stop I compose again with this blog to spell it out my recent experience of moving a vintage CB walkie-talkie to be able to 29 MHz AM inside the 10 meter group.

I acquired found a good pair regarding Inno-Hit RT923 talkies regarding 15 euros, while browsing a crap dealer go shopping near residence, looking regarding something low-cost and unconventional for our collection regarding useless items. They looked really good problem and My partner and i though in which probably there was still functioning too. Next few nights, I marketed the better-looking one by using an on-line market site regarding 10 euros and I made a decision to try moving the rest of the talkie about 10 metres, 29 MHz FEEL. Here below several photographs with the "star" with this post.

The Inno-Hit can be a 3 programs, 2 t, crystal-controlled mobile CB transceiver. The receiver can be a single-conversion superetherodyne together with 455 kHz WHEN. The arizona frequency as well as the local oscillator frequency inside the rx are usually controlled simply by two diverse crystals. The LO gem is needless to say 455 kHz below the specific rx regularity.
The identical rig has been sold together with several brands and several differencies (mainly cosmetic); as an example Royce 1-402, Outstanding BT-1232, Finetone TNC-203, MacDonald CE-420, Universum BSG-3271 and possibly others. Dozens of rigs originated in the middle of the '70s and also had a really robust metallic case, using a small beginning door around the front to gain access to the battery pack. Some of which had outside connectors with an external antenna, earphone, power supply or battery power charger. Usually we were holding sold with only 1 channel actually built with crystals (for CB route 11).

The unbelievable successes regarding my buddy Franco I5KAP about 10 metres AM, with even earliest pens and basic QRP rigs, motivated me.
A trip to Franco (who stay 10 km roughly from my own QTH) confident me to look ahead together with my program. Franco has been very sort and aided me inside deciding which usually modifications could have made sense to use.
First selection, was to be able to leave the particular transceiver whenever you can in the original package and physical appearance. Given ab muscles limited space in the case, the simply sensible modifications to accomplish were to incorporate external connectors for your antenna and power supply (or outside battery) and lastly to obtain a new couple of crystals (for the particular rx and also tx oscillators) for your 29 MHz FEEL band.
The uric acid were ordered with a factory in the n . of Croatia (unfortunately, they will costed concerning 25 euros each, which includes taxes and also shipment). However bought for 2 euros each and every some schematic diagrams with the walkie-talkies I stated earlier (in distinct, those which usually had the particular antenna and power supply connectors) and also I proceeded together with my perform.
I identified the higher points inside the circuit were to get in touch the outside antenna and power supply, I prepared the tiny removable plastic-type panel that has been inserted around the right side with the case (like inside photographs below) and also quickly checked that most was ALRIGHT, both mechanically and also electrically.

Now it absolutely was simply any matter regarding setting a tiny measurement counter and carry out some tweaking around the tx path as well as the rx path to make sure that the talkie can work properly on the new regularity. This could be the subject regarding next submit. Thank an individual for studying.