Hello, I am looking to buy a UT-34 Tone Squelch Unit. I am also looking for an AG-1200 23cms mast head pre-amp. I have for sale/trade an AG-25 VHF mast head pre-amp and an AG-35 UHF mast head pre-amp. Both pre-amps have been used and are in full working order. The search is on... Cheers, Dave.