PDA

View Full Version : ICOM IC 720a


K8TAE
02-10-2018, 02:23 PM
I just bought an IC 720a at a hamfest. It's in really good condition. My question is that when it is turned on, it takes a few minutes to come on
and start tuning to the band..(the klacking sound). Is that normally how the 720's start up? Thanks.
KG4CGC
02-11-2018, 12:04 AM
See if there is something that helps here.

https://forums.hamisland.net/showthread.php/20277-Icom-IC-720A
N1RPN
02-11-2018, 10:48 AM
Yes. The 720 has a mechanical band switch that the microprocessor ratchets around with a solenoid. When you first turn the radio on part of its power on self test is to find the beginning of the band switch.
K8TAE
02-11-2018, 11:14 AM
Thank you for your information...I have been a tech for 15 years and I am studying for my general ticket. I am new to HF rigs so I just wanted to be sure.
K8TAE
02-11-2018, 11:16 AM
Thank you... I will check the site out. 73
N8YX
02-11-2018, 01:44 PM
I have an IC-7072 interface that allows you to slave an R-70 to the 720(A). If interested, get in touch.
K8TAE
02-17-2018, 10:14 PM
Slave an R-70 to a 720A means what exactly? Thanks...73
N8YX
02-19-2018, 10:33 AM
Slave an R-70 to a 720A means what exactly? Thanks...73
The R-70 has better interference-fighting controls than the '720 does. With the EX-7072, you can control the '720's operating frequency by means of the R-70's tuning dial. It's like having two receivers in one.

Go here and read N3WXW's review of the setup:

http://www.eham.net/reviews/detail/2594?page=1


An eBay listing for one: https://www.ebay.com/itm/Icom-IC-7072-Interface-For-IC-720-IC-R70-Transceiver-C-MY-OTHER-HAM-RADIO-GEAR-/192093772904