fix(elecraft): the K3 power meter converts to real watts

The operator measured the whole table: 10 W showed 83, 12 W showed 100, 13 W
showed 8 — the bargraph is relative to a meter RANGE that flips at 12 W
(0-12 QRP, 0-120 above). A bar percentage was never watts; with the PC
setting choosing the range, it converts, and the console prints the watts
beside the bar.

changelog.json

@@ -3,10 +3,12 @@
     "version": "0.27.2",
     "date": "",
     "en": [
-      "Bulk operations work on any size of selection — setting a field, fixing frequencies, deleting, marking uploads and exporting the selection all failed with “too many SQL variables” past a few tens of thousands of QSOs. Statements are now issued in slices."
+      "Bulk operations work on any size of selection — setting a field, fixing frequencies, deleting, marking uploads and exporting the selection all failed with “too many SQL variables” past a few tens of thousands of QSOs. Statements are now issued in slices.",
+      "Elecraft console: the power meter reads in real watts. The K3’s bargraph is relative to a range that flips at 12 W — calibrated against a real radio’s full table, the PC setting picks the range and the bar converts to watts."
     ],
     "fr": [
-      "Les opérations groupées fonctionnent quelle que soit la taille de la sélection — définir un champ, corriger des fréquences, supprimer, marquer les uploads et exporter la sélection échouaient avec « too many SQL variables » au-delà de quelques dizaines de milliers de QSO. Les requêtes sont désormais émises par tranches."
+      "Les opérations groupées fonctionnent quelle que soit la taille de la sélection — définir un champ, corriger des fréquences, supprimer, marquer les uploads et exporter la sélection échouaient avec « too many SQL variables » au-delà de quelques dizaines de milliers de QSO. Les requêtes sont désormais émises par tranches.",
+      "Console Elecraft : le wattmètre lit en vrais watts. Le bargraph du K3 est relatif à une gamme qui bascule à 12 W — calibré sur la table complète d’une vraie radio, le réglage PC choisit la gamme et la barre se convertit en watts."
     ]
   },
   {

frontend/src/components/ElecraftPanel.tsx

@@ -18,7 +18,7 @@ type KenwoodState = {
   available: boolean; model?: string; elecraft: boolean; mode?: string; data_sub?: string;
   transmitting: boolean; split: boolean; split_tx_hz?: number;
   s_meter: number; s_meter_raw: number;
-  power_meter: number; swr: number; swr_raw: number;
+  power_meter: number; power_w?: number; swr: number; swr_raw: number;
   rf_power: number; af_gain: number; rf_gain: number; mic_gain: number; squelch: number;
   preamp: boolean; att: boolean; nb: boolean; nr: boolean; agc?: string;
   filter_hz: number; antenna: number; rit: boolean; xit: boolean; rit_offset: number; key_speed: number;
@@ -222,7 +222,8 @@ export function ElecraftPanel({ onReportRST }: { onReportRST?: (rst: string) =>
             onReportRST(sMeterRST(sp.s, sp.over, view.mode));
           }}
           title={t('k3.sMeterHint', { raw: String(view.s_meter_raw) })} />
-        <MeterBar label="PWR" value={view.transmitting ? view.power_meter : 0} lo={0} hi={100} accent="#0ea5e9" />
+        <MeterBar label="PWR" value={view.transmitting ? view.power_meter : 0} lo={0} hi={100} accent="#0ea5e9"
+          display={view.transmitting && view.elecraft ? `${view.power_w ?? 0} W` : undefined} />
         {/* 0 means "not measured", and it must not render as a perfect 1.0:
             a match that looks ideal on an antenna nobody has measured is the one
             reading that can cost a radio. */}

frontend/wailsjs/go/models.ts

@@ -1083,6 +1083,7 @@ export namespace cat {
 	    s_meter: number;
 	    s_meter_raw: number;
 	    power_meter: number;
+	    power_w: number;
 	    swr: number;
 	    swr_raw: number;
 	    rf_power: number;
@@ -1120,6 +1121,7 @@ export namespace cat {
 	        this.s_meter = source["s_meter"];
 	        this.s_meter_raw = source["s_meter_raw"];
 	        this.power_meter = source["power_meter"];
+	        this.power_w = source["power_w"];
 	        this.swr = source["swr"];
 	        this.swr_raw = source["swr_raw"];
 	        this.rf_power = source["rf_power"];

internal/cat/kenwood_panel.go

@@ -53,6 +53,12 @@ type KenwoodTXState struct {
 	// PowerMeter is 0-100 while transmitting. SWR is the ratio; 0 means "not
 	// measured", NOT a perfect match.
 	PowerMeter int `json:"power_meter"`
+	// PowerW is the transmit power in WATTS, derived from the bargraph and the
+	// meter's RANGE. The K3's bar is relative to a range that flips at 12 W —
+	// calibrated against a real one: 10 W showed 83 (10/12), 100 W showed 83
+	// too (100/120). The bar alone never was watts; with the PC setting to
+	// pick the range, it converts. 0 while receiving.
+	PowerW int     `json:"power_w"`
 	SWR    float64 `json:"swr"`
 	SWRRaw int     `json:"swr_raw"`
 
@@ -162,6 +168,7 @@ func (k *Kenwood) readPanel(mode string, split bool, txHz int64, txNow bool) {
 		// Cleared, not frozen: a power bar left standing after the carrier drops
 		// reads as a live transmission.
 		k.panel.PowerMeter = 0
+		k.panel.PowerW = 0
 		k.panel.SWR, k.panel.SWRRaw = 0, 0
 		k.powerPeak, k.swrPeak = meterPeak{}, meterPeak{}
 		// The S-meter only means anything while receiving.
@@ -341,6 +348,13 @@ func (k *Kenwood) readTXMeters() {
 	defer func() { k.noLatch = false }()
 	if v, ok := k.askNum("BG;", "BG", 2); ok {
 		k.panel.PowerMeter = k.powerPeak.update(kenwoodBargraphPercent(v), now)
+		if k.elecraft {
+			scale := 120
+			if k.panel.RFPower > 0 && k.panel.RFPower <= 12 {
+				scale = 12 // the K3's QRP range
+			}
+			k.panel.PowerW = k.panel.PowerMeter * scale / 100
+		}
 	}
 	// SW; — SETTLED, from Elecraft's own release note: three digits, tenths of a
 	// ratio. "SW023;" is 2.3:1, and "SW999;" is the 99.9:1 it reports instead of