This is a Tadiran RT-601 47-57 mhz squad radio, 6 channels, one crystal for tx/rx.  It had no crystals when I purchased it, only one article I found listed the crystal number, I purchased one for 51 mhz and the radio works on rx but will not lock on tx, it drifts just either side, this according to my prm34 test set.  If you remove the strap side cover you can see numbered adjustment screws which I believe are for tuning.  I am looking for someone who would be willing to try and align this, I know it is a challenge with no documents but with the rx working it may be a start.  I will of course pay any expenses.<div><br></div><div>Thanks</div><div>Mark</div><div><br></div><div>K1HF</div>