Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire, UK, demonstrates the correct alignment procedure on the Icom ICB-1050 - not to be confused as being anything to do with "the real" Icom company!
These budget Hong Kong made sets from 1981 can perform well on transmit, though the receive was prone to 'bleedover' from adjacent channels. However, these days with far less users on, that particular snag shouldn't be a problem, especially if the rig is used mobile. These radios are pigs to set up because of the 3-crystal synthesiser arrangement using the general purpose Motorola MC145151 chip, rather than the better & more usual arrangement provided by UK dedicated chips with their double masked ROM's. Because of the general purpose synthesiser, it's only a matter of swapping a couple of wires over, putting in a couple of links & adding a 10K resistor for these transceivers to go straight on the 28Mhz radio amateur band. Unfortunately there were very many failures owing to both incompetence & lack of test equipment, so there used to be plenty of these sets around in a "scrap" condition.
The radio in this video was really a scrap set & hours of painstaking work putting more than a dozen new parts in the transmitter section owing to the previous owner trying to fit the wrong output transistor of a more powerful type. No doubt it managed 7 watts for a few minutes until various parts in the transmit driver circuit burnt out. Other snags in the synthesiser power regulator, the channel selector board & the receiver also had to be dealt with. Many of the coil cores were broken & luckily I had a scrap chassis to hand enabling me to replace these long unavailable parts for this 30 year old set. Phew!
I failed to show the receive coils being adjusted as this had previously been done yesterday. The receive coils are T101, T202 & T103 in that order. The detector coil is T105 & the S-meter S9 setting for 100uV input is RV101
