Uniden Washington + RR HF VFO V1.1 for John in VIC - 05-11-25

Workshop photos here → https://www.facebook.com/media/set/?v...

Chapters:
0:08 2Way demo with David 638 in QLD,
2:14 Modulation demo to Kenwood TS-440,
4:18 RX SWL'ing demo.

Had this very tidy Uniden Washington base CB radio for John in Victoria come in for a going over, some repairs and RR HF VFO + RR Nitro Rings install!

Into the points below...

DeoxIT D5: (Switch contacts: MOD / S/RF, NB/ANL, CH 9, AM/USB/LSB mode, DC/AC power select, power on/off, Mic PTT, ),
DeoxIT F5: (Potentiometer faders, OSC Trimmer capacitors, ),
LUBRICATE: (All rotating controls),
SPRAY CLEANED: (Cases, chassis, screws, ),
CLEANED: (Faceplate, knobs, ),
TIGHTENED: (All screws and nuts, ),
LOOSENED: (S/RF PWR S-Meter with Acetone + jewellers screwdriver, ),
REPLACED: (A selection of electrolytic capacitors, ),
UPDATED: ([PC-397AB: D401 UR-202-73DL → 0.96 SSD1306 OLED, D410-412 Red → Diffused Blue 5mm LED's, ], [TX/RX Green/Red dual → Blue/Red dual + Ω, ], [CH9 Red LED → Diffused Blue + Ω, ], ),
EXTRACTED & CLEANED: (Glue from following: X1 10.240 MHz, X3 7.7975 MHz, X4 11.1125 MHz, FT2 FL046/07M07AZ 7.8MHz, ),
MODS: ([ANL / NB XTRA channels → Stock, ], ),
INSTALL: ([RR HF VFO V1.1: PCB ground shield @ solder side, Modes AM/USB/LSB = L21/22/23, ], [7 x RR Nitro Small Blue SMD LEDs, ], [XTRA LEDs: DUAL x 2 @ S-Meter + Ω, ], ),
BROADBANDING: (RX & TX circuits, ),
REMOVED: (Electronic parts required for RR HF VFO install, RED filter behind faceplate for OLED & Blue LED light pass through, ),

ALIGNMENT NOTES: (
Internal P/S Regulator = Aligned ~13.86 V,
SYNTH OUTPUT BPF = Peaked @ 27.500 MHz: Vp 256.0 mV @ DRV = 1,
LX REF [RR HF VFO Synth] + CAR/BFO OSC = Aligned @ ~32.9 °C after 1 ½ hour warm up,
CAR BLEED = Aligned to minimum,
BIAS DRV = Aligned 25 mA / 0.671 V,
BIAS FIN = Aligned 50 mA / 0.644 V,
TX COILS = Peaked & balanced across 26.500 → 28.500 MHz,
AM RF PWR = Aligned ~4 W,
AMC / AM MOD = Checked ~90 %,
SSB ALC = Aligned ~10 W PEP,
54 MHz / 2nd HARM = Aligned ~51.6 dB below fundamental,
RX COILS = Peak SINAD & balanced across 26.500 → 28.500 MHz,
SSB RX = Peaked ~13.7 dB SINAD @ 0.222 uV 1 kHz offset,
AM RX = Peaked ~10.1 dB SINAD @ 0.585 uV 1 kHz 30% MOD,
S-METER RX S9 @ 100 uV + AM MOD % + AM RF PWR = Aligned,
ANL/NB = Peaked / aligned,
SQUELCH = Aligned, ).

RADIO CHECK: (David 638, ).

(PC-385AG)
(MB8719)
73000204

#RazorRadios #C #SourceCode #Software #Development #Microchip #ATmega328P #atmel #testing #engineer #hardware #cbradio #RRHFVFO #DX #LX #11m #27MHz #Cbradio #HF #Uniden #Washington #PC385 #MB8719