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Icom 7300 Tuner




 
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Author Topic: Icom 7300 Tuner  (Read 300 times)
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WA4WAX
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« on: January 27, 2018, 09:56:37 PM »

Question:

When the Icom 7300 tuner is off, does the set default to 50 + j0 at the jack?

Thanks!
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KB2WIG
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« Reply #1 on: January 27, 2018, 10:06:12 PM »

Most 'new' radios are designed to 'work' into a 50 ohm load.


http://www.icomamerica.com/en/products/amateur/hf/7300/specifications.aspx

"

General
 
Frequency coverage
RX
TX
  
  
  
  0.03074.800**
 1.8001.999, 3.5003.999, 5.2555.405*, 7.0007.300, 10.10010.150, 14.00014.350, 18.06818.168, 21.00021.450, 24.89024.990, 28.00029.700, 50.00054.000

* Some frequency bands are not guaranteed.

** Guaranteed range: 0.50029.999, 50.00054.000MHz.  

Mode  SSB, CW, RTTY, AM, FM  

Number of channels  101 (99 regular, 2 scan edges)  
 
              @@@@@@@@@@@@@@@@@@      Antenna connector  SO-239 (50)    @@@@@@@@@@@@

Power supply requirement  13.8V DC 15%  

Power Consumption Tx: 21A (at 100W output power)
 
Rx: 0.9A typical (Standby), 1.25A (Maximum audio)  

                                                                                             "



  I hope you're not asking,  "   If I had the radio tuner on, and tuned to a frequency, does the tuner default to the standard 50 ohm load if the tuner is tuned off?

My Icom stuff stays tuned to where it was when the tuner is turned off. But I don't know for sure what the 3000 does.

klc
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What? Me worry?
KA2DZT
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« Reply #2 on: January 28, 2018, 01:28:28 AM »

Question:

When the Icom 7300 tuner is off, does the set default to 50 + j0 at the jack?

Thanks!


I would think so,  what else would possible happen?
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w1vtp
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« Reply #3 on: January 31, 2018, 05:08:56 PM »

The source Z of all these rigs is 50 ohm +/- X furlongs per fortnights.   Grin  Which means you need to present a 50 ohm load no matter what.  With the internal tuner turned on - all bets are off unless you present the same impedance to it as the last time you pressed the 'TUNE' button

Al
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