This product is made to order by Spectrum Communications. It is not ready built waiting for dispatch.

This unit is a replacement for the green synthesizer block used in the multimode CB rigs with chassis codes PTBM059COX and PTBM121D4X and their derivatives. 

The VCO27 is a one-for-one replacement for the original green block and is for rigs with 3 or 4 bands of 40 channels.

The VCO27A is a modified version similar to the orange block for use on PTBM125A4X, PTBM131A4X, PCMA001S and Cybernet rigs with 200 channels and can also be used on PTRF005DOX chassis in the Midland 78-999 homebase.

The VCO27B is the replacement for the orange block in the PTBM133A4X that has an additional wire.

Please send a 'note to the seller' if you want the VCO27 or VCO27A or VCO27B.

Tracked carriage is quite high.  If you use a computer instead of a mobile phone to order then you can click to buy several items up to a value of 50GBP and ask for an invoice.  I then adjust the postage and return to invoice for acceptance and payment.