(meteorobs) Frequencies no go.

[Michael Boschat]

Hi Paul:

> How certain are you that you are tuned correctly?  Ie., how accurate
> is the R-10?

The receiver is way discontinued but here are the specs of it:


IC-R10 Specifications

General

     Frequency Range U.S.A. Version:
         0.5000-823.9999, 849.0001-868.9999, 894.0001-1300.0000
     Mode: FM, WFM AM, USB, LSB, CW
     Tuning Steps: 0.1, 0.5, 1, 5, 6.25, 8, 9, 10, 12.5, 15, 20, 25,  
30, 50, 100 kHz
     or user-programmable (0.1-999.9 kHz/0.1 kHz steps)
     Antenna Connector: BNC (50 ohms)
     Usable Temperature Range: -10°C to +50°C; +14°F to +122°F
     Current Drain (at 13.5 V DC):
         Rated Audio: 180 mA typ.
         Standby: 110 mA typ.
         Power Saved: 38 mA typ.
     Power Supply Requirement: 4.8 V DC (4 AA (R6) Ni-Cd cells); or,  
4.8-16 V DC acceptable (negative ground)
     Dimensions: 58.5(W) x 130(H) x 31.3(D) mm, 2.3(W) x 5.1(H) x  
1.2(D) in (projections not included)
     Weight: 310 kg; 10.9 oz.
     CI-V Connector: 2-conductor 3.5(d) mm (1/8")
     Scan Speed
         Programmed: 16.7 channels/sec.
         Memory: 6.25 channels/sec.


Receiver

     Receive System: Triple superheterodyne
     Intermediate Freq.
         1st: 266.7 MHz (340.000-999.9999)
         429.1 MHz (except above freq.)
         2nd: 10.7 MHz
         3rd: 455 kHz
     Sensitivity (typ.): (except spurious points)
     Freq. (MHz) 	FM 	WFM 	AM 	SSB/CW
     0.5-4.9999 	0.5 µV 	- 	1.6 µV 	0.4 µV
     5-74.9999 	0.32 µV 	- 	1.0 µV 	0.25 µV
     75-199.9999 	0.32 µV 	1.0 µV 	1.0 µV 	0.25 µV
     200-339.9999 	0.45 µV 	2.2 µV 	1.6 µV 	0.4 µV
     340-699.9999 	0.35 µV 	1.3µV 	1.4 µV 	0.32 µV
     700-799.9999 	0.79 µV 	2.0 µV 	2.0 µV 	0.63 µV
     800-899.9999 	0.5 µV 	1.6 µV 	1.6 µV 	0.4 µV
     900-1300.0000 	0.5 µV 	- 	1.6 µV 	0.4 µV
     FM and WFM are measured at 12 dB SINAD; AM, SSB and CW are  
measured at 10 dB S/N.
     Squelch Sensitivity: (at threshold)
     Freq. (MHz) 	FM 	WFM 	AM
     0.5-4.9999 	0.5 µV 	- 	1.6 µV
     5-74.9999 	0.32 µV 	- 	1.0 µV
     75-199.9999 	0.32 µV 	1.0 µV 	1.0 µV
     200-339.9999 	0.45 µV 	2.2 µV 	1.6 µV
     340-699.9999 	0.35 µV 	1.3 µV 	1.4 µV
     700-799.9999 	0.79 µV 	2.0 µV 	2.0 µV
     800-899.9999 	0.5 µV 	1.6 µV 	1.6 µV
     900-1300.0000 	0.5 µV 	- 	1.6 µV
     Selectivity
     SSB, CW: More than 4 kHz/6 dB
     AM, FM: More than 15 kHz/6 dB
     WFM: More than 150 kHz/6 dB
     Audio Output Power: More than 120 mW at 10% distortion with an 8  
ohm (at 13.5 V DC) load.
     External Speaker Connector: 3-conductor 3.5(d) mm (1/8")/8 ohms
     Specifications are subject to change without notice.



Clear skies
----------
Michael Boschat
Halifax Center - Royal Astronomical Society of Canada
Astronomy page:  http://www.chebucto.ns.ca/~aa063