Potential new user seeks clarification

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  • Updated 2 weeks ago
Hi, after years of using Icom am considering a complete change and moving to SDR with Flex. I'm just unclear on the idea of slice receivers. So, I'm considering a 6400, it has two slice receivers. Does each of the slices have VFO A and B ? So can I have 1 slice receiver running in a split pile on say 20m , while the 2nd slice receiver monitors another pileup on for example 15m. Or if I wish to operate in that split pileup on 20m 1 slice sits on the DX qrg and the other is in the pileup, in other words like plain vfo and vfo b. Or, do I need to have 4 slice receivers as in the 6500/6600 to do the dual band working. 73 de Declan EI6FR
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Declan Craig

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Posted 3 weeks ago

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Lou

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With 6400 absolutly No. If you want split run you can use just one slice
(Edited)
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KY6LA - Howard, Elmer

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Simple answer Maybe. Depends on whether you have 1 or 2 antennas. If you have 1 antenna then a 64oo can receive in both frequencies. With each slice on a different band but the filters would be wide open


If you have 2 antennas then you need a 6600/6700. Not a 6500.


The reason is not sliced but what is called Spectral Capture Units which are in effect separate receivers

The 6600/6700 have 2. The others only have 1
(Edited)
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Burt Fisher

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I have a 6400M are you saying I can use each slice on a separate antenna at the same time?
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KY6LA - Howard, Elmer

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No. It only has one SCU
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Dudley - WA5QPZ, Elmer

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Howard has you on the right track about  SCUs ,  Spectral Capture Units,  but consider a slice as a small "piece"   of the SCU spectrum ,  like "slicing"  up a pie.   The whole "pie"  would be the SCU coverage   Hope it helps

Dudley
WA5QPZ
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Steve Gw0gei

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Hi Declan, I have run a flex 6300 and 6500 previously and now run the Anan 7000. Drop me an email via qrz if you want to set up a sched on 80m to discuss the slice / scu. and antenna options. 73 Steve gw0gei (now moved to around 1000ft asl in Io72ve. So could also work you direct on 2m!
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Declan Craig

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Hi Steve, thanks for the reply. I'm only dipping the toe in the water, it'll be next year as my retirement radio HI , 73
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Declan Craig

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Thanks to all that replied, I'm a little more in the picture now , 73 de Declan

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Bill -VA3WTB

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Declan, now that you understand what a slice is, you can see how they work on each band.
On the 6400 we have one SCU, this allows for two slices working the same band, say for split. But you can't open a slice on seperate bands with out effecting the other slice. Both antenna ports are using the same one SCU. How ever on a 6700, 6600 with two SCUs you can work two bands at the same time, each antenna would be on it's own SCU.

For performance and station integration,,Flex has the advantage on most other radios.
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k0eoo

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Hello Declan,

If you have an antenna, like a tribander or trapped dipole or vertical, you can have one slice on 20m and the other on 15m and monitor both simultaneously and switch between the two in transmit mode.  Each slice receiver has a RIT/XIT capability so you can listen to the DX station on 20m, for example, and move your TX frequency to work a pileup up a few kHz's, and, you can do the same on 15m.... (also, if you have remote antenna switching you can do the same with mono band antennas.)

As has already been mentioned, because the 6400/6500 both have one SCU, you have one antenna port per SCU in the radio.  if you get the 6600/6700 you get two SCU's so you can have two seperate mono band beams or other mono band antennas and do the same as mentioned in the first paragraph plus more because you have more slice receivers...

Hope I didn't confuse you more?  I have a 6500 and toggle between 2 bands during a contest when I run my multi band antenna or with remote antenna switch my mono band antennas.

Regards, Dennis, k0eoo
(Edited)