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Details about  Ham Radio: Johnson Viking Ranger

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Ham Radio: Johnson Viking Ranger
Ham-Radio-Johnson-Viking-Ranger
Item Ended
Item condition:
Used
Ended:
May 27, 2012
Starting bid:
US $800.00
0 bids ]
Shipping:
$48.26 Standard Shipping | See details
Item location:
Cornelius, Oregon, United States

Description

eBay item number:
230794633003
Seller assumes all responsibility for this listing.
Last updated on  May 26, 2012 12:14:13 PDT  View all revisions

Item specifics

Condition:
Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully ... Read moreabout the condition
Brand:

EF Johnson

Supported Modes: AM, CW Model:

Viking Ranger

Frequency Band(s): HF

                                                            ****************************************     EF Johnson Viking Ranger HF Transmitter ***********************  

                                                                             ************ Refurbish and testing complete.  *****************************

 

                                                                                              Photos are of the unit "In Process".       

                                                                            Front Panel Photo is the completed unit re-installed in case .

Done so far:  5/1~~5/5/12:  Chassis, top and bottom scrubbed. Panel cleaned (gently) with Novus #2). Switches cleaned and alcohol washed.  Untold pounds of nicotine removed ( uck).  All resistors checked: approximately 15 replaced ( so far). Knobs white "dot" replaced.  All capacitors ( except some micas in the VFO) are being replaced (some are installed, more to go). Some deteriorated wiring replaced and cable ties installed when necessary.  R15 replaced (with a 25W ) and its mounting hardware replaced ( missing).  5 tube sockets replaced: V3,V4, with mil-grade ceramic, V5 with Amphenol ceramic. Large number of tube socket rivets drilled and ground hardware replaced ( loose rivets). Internal tooth lock washers, KEP nuts, and internal tooth ground lugs used liberally. ( Original grounding scheme copied) All of the 4.7uh chokes replaced. V12 tube socket replaced with amphenol phenolic. V6 tube socket replaced with mil grade phenolic. Microphone input cable replaced with teflon insulated cable: ( Upper left and center of photo of bottom of chassis) microphone input resistor scheme replaced.. Lots and lots of rusty, corroded and missing hardware replaced. All illumination lamps replaced. Photo shows meter removed for cleaning.  Photo shows VFO enclosure removed. V2 replaced ( envelope melted), all bypass caps in VFO replaced. R3 will be replaced with 18K/5W modern wire wound resistor. J3 output connector and mounting hardware replaced . Teflon sleeving added to L11A taps where they pass through chassis holes ( we found evidence of at least one "arc over"). X13B jumper plug and cover replaced ( missing). ***** NOTE**** No other mods are being done to the unit other than the upgraded tube sockets and improved grounding hardware.  We are returning this unit to "factory wiring configuration". Black plastic gizmo on rear panel at opposite end from RF output connector is the strain relief for a new AC 3 conductor line cord. (New fuse holder will be on the inside of the rear lip of chassis.)

5/6.2012: New three wire AC Line cord installed. Power transformer primary and function switch circuit on/off resistance okay.

5/7/12: All caps replaced in mic amp. New mic input cable installed. Low Voltage filter cap installed (40/500V). Loading caps replaced. Metering resistors replaced (5). PA amp 4.7uh choke and bypass caps installed. All the old mica caps in and around the PA, Multiplier, and driver stages have been replaced.

5/8/12: Caps in ALC rectifier circuit replaced. Dial mechanism drive lubricated. VFO adjustment rod (5) assemblies repaired. All chokes and bypass caps around X13A replaced. Meter assembly re-installed. New X13B ( jumper plug) installed.

5/09/12: Dissambled front panel VFO dial sub panel. Cleaned freq display panel. Found VFO tuning insulated coupling phenolic plate broken ( cracked off at corners) causing backlash in dial tuning. Replaced phenolic insulating plate with 0.002 fiberglass. Replaced coupling set screws with stainless steel allen set screws. Disassembled, cleaned and re-lubricated ball bearing reduction drive assembly. ( we use Lubriplate). VFO Tuning now smooth as silk !  Replaced tuning knob set screw with Allen SS screw. Replaced dial pointer set screw with Allen SS screw. All electrolytic caps in the unit have now been replaced with modern equivalents. We made no attempt to replicate the "vintage" look of electrolytic caps. Replaced PA tube cap assembly with a ceramic cap. Installed remaining B+ bypass cap on PA B+ line. Installed R38 ( 3 33K 2W resistors,lower right hand edge of photo). Installed deck mounted line fuse holder ( inside rear lip of chassis). Installed LV choke ( Left side of photo), installed HV filter capacitor assembly ( white sleeve, 20uf/1KV ) on top of LV choke . Installed plate and heater wiring to LV tube socket. ( Upper left  of photo). Both filter capacitors have enough voltage headroom to accomodate solid state rectifiers.

5/11/12: First power on tests today, probably the first time this thing has had power applied in a long while. Idle AC current ( no loads at all) looks good. Tube heater test looks good: All tubes lighting up, dial and meter lamps glowing like they should. We are going to let this thing be powered on in the heater mode for a few hours and see if all is well ( the preliminary smoke test). 5 mica caps and 4 bypass caps replaced in the VFO. New grounding hardware for the replacement bypass caps installed.   New 18K 5W resistor on order. Heater smoke test seemed fine: no smoke.

5/14/12: Re-installed multiplier shield assembly with new sheet metal screws and #4 internal tooth lock washers.

5/16/12: Re-installed microphone input shield. Ordered VFO dial sub panel rubber edging. Ordered new case bottom rubber bumpers ( originals are in very poor condition).

5/17/12: Installed 18K  R3 : installed on a threaded rod with fiber shoulder washers top and bottom, secured to chassis inside the VFO enclosure.  We ran the VFO for 5 hours and then checked the temperature of R3: barely warm.  Low voltage power-up. + LV @335vcd or so. VFO regulator tube fires okay. VFO has output. RF on grid of V4: RF looks good on scope and on counter. VFO tunes smoothly: 40 meter position ( VFO cover off), 6.9mhz~~7.3 or so. Osc,buffer and PA grid metering seems to have come alive. Buffer tuning shows RF "peak". ( +HV not yet on). "Drive" control seems to work okay. PA Grid metering does show RF drive. VFO alignment not yet done.

5/18/12: Re-installed VFO shroud, all new hardware and lock washers. We are going to let the VFO power up for 5 or 6 hours to watch drift tendency. Installed new grounding fixture on rear lip of chassis.

5/22/12: Installed new VFO sub panel edge gasket. Re-installed VFO sub panel, buffer and PA panel knobs . VFO alignment fell right into place on 40 & 160:  we use an accurate frequency counter. Re-installed HV components including new 20uf/1kv filter capacitor. Re-installed R35: fabricated new mounting clips for R35:( old ones were broken). Checked R35: resistance ok.

5/24/21: HV enabled. HV is around 590 unloaded, (540 loaded) @ 120VAC input : ( Phone). Power output ( phone, unmodulated ) on our shop Bird is 40W (7.2mhz) Buffer tuning seems smooth, PA tuning dip is sharp and loads up nicely to PA IP spec. Metering seems okay. Grid drive ample on 7.2mhz. Clamp tube operation okay. Modulator screen current within specs, no adjustment needed. Panel "operate" lamp okay.

5/25/12: Check CW mode on 7.2mhz. Keyer works okay. Bias rectifier voltage okay. Check P/O 160-10: 40w decreasing to 22w or so on 10. ( Phone and CW). We did NOT check 11 meters and have no plans to do so. Accomplished AM modulator checks on 7.2mhz: 1khz tone demodulated looks very good on our shop Tek 465 scope. Tone source used is a HP204C low distortion audio oscillator @ 1khz. 100% modulation achievable. Replaced case bottom feet. Lubricated case hardware ( those three long bolt-things that hold the case together). Re-assembled unit:  replaced missing and rusted rear case attach machine screws (see note below), and re-tested. Included is a vintage Drake Low Pass Filter.  *** Note about circuit wiring***   This unit's wiring matches the so-called Ranger 1: Ranger II has slight wiring changes, especially around the grid of V5 and the addition of 6 meter capability **** This unit does NOT have any push to talk ( PTT) circuitry.

5/26/12:  Our basic philosophy with these old units is pretty simple: There is no such thing as a reliable 50-60 year old capacitor, regardless of the type, so they all must go.  Resistors: anything even remotely close to the edge of their tolerances must go. If there is any doubt at all  about grounding schemes, rivets get drilled and replaced with modern internal tooth solder lugs and modern hardware.  Modern components are much more reliable, smaller, less prone to failure ( in our experience) than all the NOS stock on the planet.

5/26/12: A little promo here: The Ranger is a compact, relatively stable ( by modern standards its not THAT stable) nice basic 65W input transmitter. Perfect for CW, so so for AM, and just the thing to get on the air with. Okay, its missing PTT and a lot of the modern bells and whistles, but its your rock solid CW radio. Easy to tune up, easy to use, almost indestructable, loads up almost anything ( the clamp tube is a wonderful addition) and pleasing to look at.

 

Known cosmetic issues: Meter face lettering has faded in one area, one (1) rear case attach screw ( 10/32 that attaches the cabinet to the chassis rear lip) missing: threaded nut plate/ hole is stripped. Case and front panel could use a re-paint and some re-silk screening. A couple of the knobs are frozen on their respective shafts, so we did not try to take them off to replace the set screws: the knobs are cosmetically just fine.

 

Serial Number: Unknown ( data decals have long since faded away), Photo: unit you will receive.

All sales final: No returns or exchanges. No warranties expressed or implied. Shipping is via FED EX, Single Boxed and insured. If you need double boxing and insurance, please contact us. Single boxed shipping weight approximately 60 pounds.

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