800 MHz 100W PA - Revision history

Bryan at 02:51, 1 December 2016

2016-12-01T02:51:09Z

Bryan: /* Basics */

2016-10-27T06:57:16Z

Basics

Bryan: /* Basics */

2016-10-27T06:56:17Z

Basics

Bryan: /* Basics */

2016-10-27T06:56:00Z

Basics

Bryan: /* Basics */

2016-10-27T01:22:13Z

Basics

Bryan at 01:19, 27 October 2016

2016-10-27T01:19:16Z

Bryan: /* Pictures */

2016-10-27T01:12:47Z

Pictures

Bryan: /* Pictures */

2016-10-27T01:10:56Z

Pictures

Bryan: /* Basics */

2016-10-26T23:53:01Z

Basics

Bryan: /* Conversions */

2016-10-26T23:47:42Z

Conversions

← Older revision		Revision as of 02:51, 1 December 2016
Line 118:		Line 118:
	L4123 PA Fan Control.png\|800 MHz PA Fan control inductor		L4123 PA Fan Control.png\|800 MHz PA Fan control inductor
	</gallery>		</gallery>
		+
		+	[[Category:Quantar]]

@@ Line 4: / Line 4: @@
 The Basic module is pictured below.
-[[file:800 MHz POWER AMPLIFIER MODULE Layout.png|300px|center|thumbnail|800 MHz POWER AMPLIFIER MODULE Layout]]
+<gallery heights=300px widths=300px mode="packed-hover">
 The major parts of the PA are

@@ Line 4: / Line 4: @@
 The Basic module is pictured below.
-[[media:800 MHz POWER AMPLIFIER MODULE Layout.png|300px|center|thumbnail|800 MHz POWER AMPLIFIER MODULE Layout]]
+[[file:800 MHz POWER AMPLIFIER MODULE Layout.png|300px|center|thumbnail|800 MHz POWER AMPLIFIER MODULE Layout]]
 The major parts of the PA are

@@ Line 4: / Line 4: @@
 The Basic module is pictured below.
-[[File:800 MHz POWER AMPLIFIER MODULE Layout.png|300px|center|thumbnail|800 MHz POWER AMPLIFIER MODULE Layout]]
+[[media:800 MHz POWER AMPLIFIER MODULE Layout.png|300px|center|thumbnail|800 MHz POWER AMPLIFIER MODULE Layout]]
 The major parts of the PA are

← Older revision		Revision as of 01:22, 27 October 2016
Line 35:		Line 35:

	The exciter controls the output power by an analog output (V_CONT) 0-5v from the CPU. This voltage is then used to control a couple transistors (Q4100 & Q4101) making the V_OMNI voltage that varies the first stage in the Intermediate PA.		The exciter controls the output power by an analog output (V_CONT) 0-5v from the CPU. This voltage is then used to control a couple transistors (Q4100 & Q4101) making the V_OMNI voltage that varies the first stage in the Intermediate PA.
−	~~[[File:]]~~

	The complete schematics are PNG format and are also available as a		The complete schematics are PNG format and are also available as a

← Older revision		Revision as of 01:19, 27 October 2016
Line 24:		Line 24:
	\|}		\|}

−	~~The R3 and R4 module part numbers are the same as what's in a generation one amplifier. R0-R2 is new parts which cover the whole frequency range (380-470 MHz) with the exception of the R2 LPF.~~

	The IPA module is a 1.5 W output that feeds into the DPA. The DPA takes this and ups it to 5-15W depending on the VOMNI control voltage. The passes into the FPA which can output 140-160W.		The IPA module is a 1.5 W output that feeds into the DPA. The DPA takes this and ups it to 5-15W depending on the VOMNI control voltage. The passes into the FPA which can output 140-160W.

@@ Line 49: / Line 49: @@
 This is an 800 MHz unmodified PA I took pictures of.
 <gallery mode="packed-hover">
-MHz PA 00001.JPG|Quantar 800 MHz PA
+MHz PA 00001.JPG|Quantar 800 MHz PA 01
-MHz PA 00002.JPG|Quantar 800 MHz PA
+MHz PA 00002.JPG|Quantar 800 MHz PA 02
-MHz PA 00003.JPG|Quantar 800 MHz PA
+MHz PA 00003.JPG|Quantar 800 MHz PA 03
-MHz PA 00004.JPG|Quantar 800 MHz PA
+MHz PA 00004.JPG|Quantar 800 MHz PA 04
-MHz PA 00005.JPG|Quantar 800 MHz PA
+MHz PA 00005.JPG|Quantar 800 MHz PA 05
-MHz PA 00006.JPG|Quantar 800 MHz PA
+MHz PA 00006.JPG|Quantar 800 MHz PA 06
-MHz PA 00007.JPG|Quantar 800 MHz PA
+MHz PA 00007.JPG|Quantar 800 MHz PA 07
-MHz PA 00008.JPG|Quantar 800 MHz PA
+MHz PA 00008.JPG|Quantar 800 MHz PA 08
-MHz PA 00009.JPG|Quantar 800 MHz PA
+MHz PA 00009.JPG|Quantar 800 MHz PA 09
-MHz PA 000010.JPG|Quantar 800 MHz PA
+MHz PA 00010.JPG|Quantar 800 MHz PA 10
-MHz PA 000011.JPG|Quantar 800 MHz PA
+MHz PA 00011.JPG|Quantar 800 MHz PA 11
-MHz PA 000012.JPG|Quantar 800 MHz PA
+MHz PA 00012.JPG|Quantar 800 MHz PA 12
-MHz PA 000013.JPG|Quantar 800 MHz PA
+MHz PA 00013.JPG|Quantar 800 MHz PA 13
-MHz PA 000014.JPG|Quantar 800 MHz PA
+MHz PA 00014.JPG|Quantar 800 MHz PA 14
-MHz PA 000015.JPG|Quantar 800 MHz PA
+MHz PA 00015.JPG|Quantar 800 MHz PA 15
-MHz PA 000016.JPG|Quantar 800 MHz PA
+MHz PA 00016.JPG|Quantar 800 MHz PA 16
-MHz PA 000017.JPG|Quantar 800 MHz PA
+MHz PA 00017.JPG|Quantar 800 MHz PA 17
-MHz PA 000018.JPG|Quantar 800 MHz PA
+MHz PA 00018.JPG|Quantar 800 MHz PA 18
-MHz PA 000019.JPG|Quantar 800 MHz PA
+MHz PA 00019.JPG|Quantar 800 MHz PA 19
 </gallery>

@@ Line 62: / Line 62: @@
 = Conversions =
 PA ID is done via a resistor "ROM".  This is a voltage divider on an analog input on the exciter.  It appears to be in half volt increments and the exciter split must match the PA.
@@ Line 76: / Line 82: @@
 ! PA Type !! PA_ID_A !! PA_ID_B !! R4162 !! R4163 !! R4164 !! R4165
 |-
-| UHF 110W R0 || 0.0 || 1.5 || OPEN || 0 || 390 || 1k
+| 900 100W || 3.0 || .5 || 20.5k || 10k || 1k || OPEN
 |-
-| UHF 100W R4 || 3.5 || 1.0 || 18k || 15k || 1.5k || 15k
+| 800 100W || 0.5 || 1.0 || OPEN || 0 || 1.5K || 15K
 |}
-== R0 to R2 ==
+Even though the IPA/DPA/PA/LPF are different from the 900 MHz PA they cover the band with full output.  The circulator is the same unit and covers 850-960 MHz.
-The major components will cover the R2 band fully.  The IPA, FPA and circulator are the same with only the LPF being different.
+The LPF is concern, but in testing for insertion loss the roll off is still sufficiently high to work at 947 MHz which would be the highest frequency for the commercial band.  The difference was .12 dB more insertion loss which is about 3W of additional dissipation.
-The LPF is different but there is not any problem with using it for R2.  I need to test the R0 LPF at R2, as I've not swept the R0, but I suspect it's substantially similar to the R1 Gen 1 module I did sweep.
+Below is a sweep of a 800 and 900 LPF; 800 is in yellow and 900 is in pink and swept with key data points taken.
 <gallery mode="packed-hover" widths=300px heights=300px>
-UHF R1 Power Amplifer Low Pass Filter sweep.png|UHF R1 Power Amplifier Low Pass Filter sweep
+Quantar 800 MHz Power Amp Low Pass Filter response.png|800 MHz Filter response
-UHF R2 Power Amplifer Low Pass Filter Overlay on R1.png|UHF R2 LPF (Purple) overlay on R1 (yellow)
+Quantar 900 Power Amp Low Pass Filter and 800 Low Pass Filter.png|900 purple and 800 yellow LPF
 </gallery>
-The only thing necessary to convert the R0 to R2 is to change the ID resistors.
+The only thing necessary to convert the 800 to 900 MHz is to change the ID resistors and then re-tune.
-== R2 to R0 ==
+A number of 800 MHz PA's have the PA fan's run continuously.  I'm not sure why this is, but it's caused by a removal of an inductor L4123 on the PA.  I've tested this by jumpering it back in place, and it does start the PA fans after it warms up, but it fails to shut it off again.  More investigation is required, if you know please update this.
-== R3/4 to R2 ==
+<gallery mode="packed-hover" widths=300px heights=300px>
+L4123 PA Fan Control.png|800 MHz PA Fan control inductor
-I've never seen the R3/4 amp modules.  The Gen 2 R3/4 parts are the same as the Gen 1 leading me to believe their may not be a Generation 2 version of these module.  This would make sense as only the R0 was added after the fact.
+</gallery>