Alpha Radio Products

Code Description Explanation Resolution

1 Gain Fault Output power is lower than expected with given input power Re-tune amp or reduce drive power

2 Mains Board could not find a tap to match line voltage AC mains are Fluctuating too much or amp was not given 30 seconds for the detection circuit to stabilize Allow amp mains circuit to stabilize before powering back on. Or, force amp to use a fixed tap.

3 Soft Ip fault trip Plate current above 1.5 amps. Reduce drive or re-tune

4 Hard Ip fault trip Plate current above 2 amps. Reduce drive or re-tune

5 Vp did not reach specified value in specified time High Voltage did not reach 3500 volts in specified time. Check transformer connections and AC mains connections. Check that auto tap selection is enabled or that amp is correctly reading ac line voltage.

6 Output relay did not close in time Output T/R relay did not close. Amplifier is in operate and no key line detected. Check Key line by shorting center conductor to screw on amp. Use the Transceiver side for this test.

7 Output relay apparently stuck on Amplifier is keyed with no key line connected. You should not see this fault in the field.

8 Bandswitch failed to reach target setting Bandswitch failed to move during power up. Turn the amp off and back on. If the fault does not clear. Turn the amp off and unplug it from the AC Mains. Plug the amp back in and power up once more. If fault still does not clear. While the amp is on press a bandswitch on the front of the amp and fault should clear.

9 Tune cap could not locate zero Cap needs to be re-initialized Turn the amp off and back on.

10 Load cap could not locate zero Cap needs to be re-initialized Turn the amp off and back on.

11 Temperature fault Tube deck reached a temp of 45 deg C. Check air flow from behind and over the amplifier. Check tubes for blockage. Fault will clear when the amp temperature is within limits.

12 Reflected power trip SWR above 3:1 Check antennas and other equipment installed after the amplifier.

13 Clear temperature fault Amp had faulted for a fault 11 and recovered. See fault 11

14 Plate voltage too high Plate voltage above 3800 Vdc. Check AC mains voltage. Unplug amp and plug amp back in and allow 30 seconds before turning back on. Check that auto tap selection is enabled, or that correct fixed tap has been forced.

15 Grid current trip Grid current above 150 mA Reduce drive or retune

16 Auto-tune algorithm failed to resolve Auto tune was unable to find a good tune point given the input power. Reduce drive and re-start the auto tune.

17 Plate current too high with amp unkeyed Amplifier has been turned on and the plate current in idle is too high with no RF drive and amp unkeyed Tube may be shorted or HV Circuit is not functioning correctly

18 Input power greater than 100W Enough said!

Code	Description	Explanation	Resolution
1	Gain Fault	Output power is lower than expected with given input power	Re-tune amp or reduce drive power

2	Mains Board could not find a tap to match line voltage	AC mains are Fluctuating too much or amp was not given 30 seconds for the detection circuit to stabilize	Allow amp mains circuit to stabilize before powering back on. Or, force amp to use a fixed tap.

3	Soft Ip fault trip	Plate current above 1.5 amps.	Reduce drive or re-tune

4	Hard Ip fault trip	Plate current above 2 amps.	Reduce drive or re-tune

5	Vp did not reach specified value in specified time	High Voltage did not reach 3500 volts in specified time.	Check transformer connections and AC mains connections. Check that auto tap selection is enabled or that amp is correctly reading ac line voltage.

6	Output relay did not close in time	Output T/R relay did not close.	Amplifier is in operate and no key line detected. Check Key line by shorting center conductor to screw on amp. Use the Transceiver side for this test.

7	Output relay apparently stuck on	Amplifier is keyed with no key line connected.	You should not see this fault in the field.

8	Bandswitch failed to reach target setting	Bandswitch failed to move during power up.	Turn the amp off and back on. If the fault does not clear. Turn the amp off and unplug it from the AC Mains. Plug the amp back in and power up once more. If fault still does not clear. While the amp is on press a bandswitch on the front of the amp and fault should clear.

9	Tune cap could not locate zero	Cap needs to be re-initialized	Turn the amp off and back on.

10	Load cap could not locate zero	Cap needs to be re-initialized	Turn the amp off and back on.

11	Temperature fault	Tube deck reached a temp of 45 deg C.	Check air flow from behind and over the amplifier. Check tubes for blockage. Fault will clear when the amp temperature is within limits.

12	Reflected power trip	SWR above 3:1	Check antennas and other equipment installed after the amplifier.

13	Clear temperature fault	Amp had faulted for a fault 11 and recovered.	See fault 11

14	Plate voltage too high	Plate voltage above 3800 Vdc.	Check AC mains voltage. Unplug amp and plug amp back in and allow 30 seconds before turning back on. Check that auto tap selection is enabled, or that correct fixed tap has been forced.

15	Grid current trip	Grid current above 150 mA	Reduce drive or retune

16	Auto-tune algorithm failed to resolve	Auto tune was unable to find a good tune point given the input power.	Reduce drive and re-start the auto tune.

17	Plate current too high with amp unkeyed	Amplifier has been turned on and the plate current in idle is too high with no RF drive and amp unkeyed	Tube may be shorted or HV Circuit is not functioning correctly

18	Input power greater than 100W	Enough said!