AMATEUR RADIO ITEMS
DON’T FORGET TO LEAVE EBAY FEEDBACK IF YOU BOUGHT IT ON EBAY AND GET INTO THE FREE MONTHLY POST CODE DRAW
AUGUST PRIZES: 49/1-50W BNC OR SO239: 1/1 CHOKES 200W BNC OR SO239
3/9/2023: THE AUG WINNER IS: M3NSY/SL0:
1/10/2023: 0915: THE SEPTEMBER WINNERS
CV9/HX1 and DA12
THE NOVEMBER WINNERS
HS12SX/PO12 + more to draw later
PRIZES FOR OCTOBER/NOVEMBER AND DECEMBER
DON’T FORGET TO LEAVE FEEDBACK TO GET IN THE FREEBIE POSTCODE DRAW, NEW MAT 10 ATU AND CHARGER, MINI SWR METER WITH SO239 SOCKETS, NEW LED SWR METER 2 >30MHz @ 100WATTS, MIL SPEC DIPOLE CENTRES, 1/1 CHOKE FAN DIPOLE CENTER 250W, 50MHz RESONANT END FED ANTENNAS (NEW), NEW PARMA CSB COMMUNICATIONS LOUDSPEAKERS, RF FIELD STRENGTH METERS, NEW TX500 HARD CASE (ALL THE PRIZES ARE SAT IN IT), AND LOTS MORE
FOR AMATEUR RADIO SALES CLICK THIS LINK
OR EMAIL G4ICD@BTINTERNET.COM
You can ask for a price of a specific item: ie: Balun/un-un etc, Current or Voltage? power required? connector required? as there are dozens of different options available like: 25/50/100/200/250/400/1000/1500 watt: Connectors BNC/SO239/”N”/”C”/SMA etc: Enclosures: low profile, black/grey/green/ivory, we can also make to your requirements. POA
BALUNS/CHOKES/UN-UNs ETC
New top commercial quality 4/1 Current baluns. Multi-core, up to 6 cores used depending on power requirements, TRUE current units not fake single core versions, UV protected enclosure, Marine M4 quality stainless steel line support rings, also provided for mounting and coax cable support. Dual special custom made cores wound with silver plated PTFE wire. Genuine PTFE SO239 socket, resin potted with condensation vent. Dual ceramic insulators for lines fitted with solder tags and wing nuts. Superb sweep of 2 > 30MHz. Various power ratings for 125/250/400/1000 watts pep ICAS prices from £35, optional tunable chokes on each line output to give a perfect balance (see further down this page). Terminated 200 ohm sweep 0 > 30MHz: 15MHz @ RL 38db = (VSWR 1.03/1). Compare this quality and price to the MFJ versions.
Return loss = 38db terminated at 200 ohms as pictured below using custom made cores and silver plated PTFE wire
The return loss on this unit is just superb: The REAL solution for Doublets, loops and OSCD antennas
There is NOTHING on the market that betters or equals this quality
Optional extra tunable chokes for Network Analyser balance of lines to produce perfection: POA
CUSTOM MADE TRANSFORMER ENCLOSURES
Custom made enclosures for your own project. Large and small formats, can be fitted with ceramic insulators, BNC/SO239 or “N” type connectors, Marine M6 stainless fittings. Ideal for Doublets, chokes etc. Prices from £10 (Mini versions)
Top quality IP/UV rated empty enclosures with rubber gasket, can be fitted with Ceramic insulators (and bonded) or complete with Balun/Un/Un etc
Specially built units with rubber gasket lids spring loaded commercial insulators as below, top professional quality, limited stocks
Top professional commercial products at realistic prices, correct cores for the correct job, quality PTFE SO239 sockets @ 50 ohms not plastic ones at 35 ohms when power is applied, semi-rigid PTFE coax for high returned attenuation of unwanted RF. Marine A4 stainless line, mounting and coax supports. Resin potted UV/IP lid lapped enclosure with internal sealing gasket.
No drills or skills? we can build the enclosure to your requirements, top insulators or side insulators, Marine A4 SS strain reliefs
FAN DIPOLE UNITS:
Fan dipole centres with/without 1/1 choke, 3 sets of RF connectors for 3 dipoles, direct connection or via 1/1 Mn type “31” choke wound with PTFE Mil spec coax, 125w, 250 or 500 watt versions (VSWR under 1.5/1). PTFE SO239 socket or made to your requirements (BNC/”N” type), resin potted, 2 x Marine A4 heavy duty stainless support eyes for lines, UV protected enclosure with rubber gasket in lid and condensation vent, from £60
Top quality construction “Fan Dipole Units”. Epoxy bonded output connectors (various types), fitted with double stainless steel locking washers and locking nuts, dual bonded earthing tags on rf connector.
Amidon Type “FT240-31” Mn core with RG196 A/U Pasternack PTFE silver plated coax or RG-402 semi rigid PTFE coax: £80.00
Smaller Mn core version below, lots of optional connectors available: £60.00
Mini empty enclosures fitted with SO239 or BNC socket plus 2 x ss strain reliefs for mounting and line, plus other options of +/- red/black connectors for balun for your project, 100’s of units in stock in black/grey or green enclosures from £15
Complete 1/1: 4/1: 9/1: 49/1 etc: Baluns/Un/Un/True Guanella multi core current units/Voltage units/Dipole centers with 1/1 units installed, various power levels, most resin potted, BNC or SO239 or “N” sockets, commercial quality, units use Ni/Zn or Mn/Zn, NO RED IRON POWDER CORES USED. 49/1 units 25/50/100/200/400/1000 watt from £15 to £60
CONTACT
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49/1 MULTI-BAND ANTENNA UNITS:
FOR AMATEUR RADIO USERS:
OVER 250 IN STOCK: THE PERFECT SOLUTION FOR QRP (LOW POWER) OPERATION & UP TO 1KW.
4 resonant (Bands 7/14/21/28MHz) frequencies from one piece of wire or use a half-wave length of wire for a spot frequency between 2 and 30MHz and only £12 for the matching unit!
On the shelf, individually tested and ready to go
Over 100 x 100 watt 49/1 units in stock, High power core larger than FT140: BNC/SO239/”N” versions. £20 ea
Over 100 x 50 watt BNC/SO239/”N” Amidon FT140-43 versions in stock £15 ea
Over 75 x 25 watt BNC/SO239/”N” versions in stock £12 ea
75 Pre-made enclosures in stock + a mega re-stock of over 1500 cores from liquidation auctions
Special purchase of 500 Mini grey boxes
9/1 UN/UN UNITS:
Mini 9/1 un/un units 2 > 30MHz, Custom made Ni/Zn/F14 core PTFE wire wound, top quality, counterpoise connector fitted, BNC or SO239 sockets, non resin or resin potted, weatherproofed, cases are black or grey, main line and counterpoise ss strain reliefs, 10 to 100w versions, superb Rhombic terminators or just use as a multiband antenna (ATU required). Prices from £20
High power 9/1 un/un units, Mil spec PTFE silver plated wire wound on a large Amidon core, resin potted, ceramic insulators, PTFE SO239, 400w pep ICAS, various formats and line supports (ATU required).
CONTACT
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4/1 VOLTAGE BALUNS:
Mini 4/1 Baluns 2 > 30MHz RL = 30db, Ni/Zn/F14 core wound with PTFE wire in PTFE sleeve, top commercial grade, 125 watt pep (400w versions made to order but larger enclosure), resin potted. Guaranteed the best available, BNC/SO239:
4/1 UN/UN UNITS:
Mini 4/1 un/un units 2 > 30MHz RL = 30db, Ni/Zn/F14 core wound with PTFE wire in PTFE sleeve, top commercial grade, 125 watt pep (400w versions made to order but larger enclosure), resin potted, counterpoise/ground post fitted. Guaranteed the best available,
4/1 un/un superb 200 ohm terminated sweep offering 30db RL @ 2 > 30MHz, guaranteed the best commercial unit on the market
RL value: 30db over 2 to 30MHz centered on 15MHz +/- 15MHz
4/1 GUANELLA CURRENT BALUNS:
125 watt:
Note: A TRUE current balun has 2 cores or more, if the winding is on 1 core it is a voltage balun, so don’t be fooled by the items offered with just one core, for more info you can read THIS LINK
4/1 Mini Current Baluns, the REAL Guanella, dual Ni/Zn cores PTFE wound, 125w pep with lines at 1.5/1 vswr, SO239 or BNC socket, superb for Delta loops, Doublets, OSCD etc, giving correct rf distribution to the feeder and dual lines, 2/3rds resin potted to ensure stability, condensation vent, ss line strain reliefs and the best part? this type of TRUE current BALUN offers good choking.
CONTACT
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4/1 GUANELLA CURRENT BALUNS:
250 watt:
4/1 Current Baluns, the REAL Guanella, two side by side specially made Ni/Zn-F14 cores PTFE Mil spec DEF 210 wound much larger than FT140-43 cores, each core is wound as a 100 ohm device and then put in series to form the 200 ohm unit, 250w pep ICAS with lines at 1.5/1 vswr, SO239 or BNC socket, superb for Delta loops, Doublets, OSCD etc, giving correct rf distribution to the feeder and lines, resin potted uv protected enclosure to ensure stability and over lapped lid fitted with a rubber gasket, condensation vent, spring loaded connectors as standard or dual ceramic insulators (extra cost), Marine A4 ss line strain reliefs each side of the enclosure and the best part? this type of TRUE current BALUN offers good choking instead of a 1/1 external unit.
Resin potted and tested
Dual single core silver plated PTFE wire wound
Superb sweep over 2 to 30MHz: RL = 28db
4/1 GUANELLA CURRENT BALUNS:
400 watt:
High power 4 core (2+2 stacked) 4/1 Guanella Current balun: A great new addition to the family of quality baluns. 400w pep ICAS with lines at 1.5/1 vswr, picture shows our special heavy duty specially made core (front) compared to FT140 (rear). 2 plus 2 stacked with individual outputs for the feeder and lines, ceramic insulators with solder tags or spring loaded connectors for lines, A4 marine stainless steel strain reliefs and mounting (3), UV protected enclosure, rubber seal in over lapped lid, part resin potted for stability with condensation vent. The 4 cores are wound with silver plated Mil spec DEF STD 210 PTFE wire. PTFE SO239 socket or “N” type socket available, and the best part? this type of TRUE current BALUN offers good choking instead of a 1/1 external unit.
Double dual custom made cores (4), resin potted, ceramic insulators or spring connectors
Over lapped lid with internal rubber gasket, UV protected, all internal joints epoxy sealed
400 watt pep ICAS with lines at 1.5/1 vswr. Spring loaded connectors or ceramic pillars with solder tags/wing nuts
Terminated 200 ohm sweep 0 to 30MHz, RL = 28db
4/1 GUANELLA CURRENT BALUNS:
1000 watt:
High power DUAL cores 4/1 Guanella Current balun: Another great addition to the family of quality baluns. 1000w pep ICS with lines at 1.5/1 vswr, individual outputs for lines with coils/ferrite tunable slugs (build is optional extra), ceramic insulators with solder tags/wing nuts for lines, A4 marine stainless steel strain reliefs and mounting (6), UV protected enclosure with rubber gasket, resin potted with condensation vent. The 2 cores are wound with thermoglaze wire in PTFE tube. PTFE SO239 socket or “N” type socket available (special build to order), and the best part? this type of TRUE current BALUN offers good choking instead of a 1/1 external unit.
6 x Stainless Steel Marine A4 strain/mounting reliefs for lines/coax and mounting
A superb 200 ohm terminated sweep
Guanella 4/1 unit, how it should be built!
Great for OSCD etc as the Guanella offers choking of returned RF
Strain reliefs and line supports plus ceramic insulators for 1kw
Optional build of added in line chokes for optimum line balance on the network analyser:
Note:
1kg in weight, a monster of a unit but a commercial product through and through
3.5mm UV enclosure walls
6 x M4 Marine Stainless line/coax and mounting loops
4/1 GUANELLA CURRENT BALUNS:
1000 watt:
IN STOCK NOW
A lighter weight version of the above but using the same cores/materials (2 x FT240 cores, 1000w pep ICAS with lines at 1.5/1 vswr). Hammond heavy duty gasket lid enclosure UV protected, dual FT240 cores PTFE wound HD copper, A4 Marine side strain reliefs for lines + coax strain relief and mounting. Lock tight line connectors or ceramic insulators with solder tags/wing nuts, PTFE SO239 (“N” socket version special order). Resin potted for stability and weather protection. Condensation vent, and the best part? this type of TRUE current BALUN offers good choking instead of a 1/1 external unit.
Top quality commercial engineering:
The “TRUE” Guanella 4/1 Current Balun
Lock tight or ceramic terminals with solder tags
Weight is approx 770g
A superb 200 ohm terminated sweep 0 > 30MHz
CONTACT
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4/1 GUANELLA CURRENT BALUNS:
2000 WATTS PEP (500w Data)
This unit utilizes 4 x FT240 cores (2+2 stacked wound with PTFE sleeve): 2000w pep ICAS (500w DATA) with lines at 1.5/1 vswr or lower.
FT240 x 4: Custom made for a high power overseas HF commercial DATA link. Weight around 1.2 kgs when part resin filled, heavy duty A4 Marine M6 ss eye strain reliefs for lines and coax and mounting and fitted with large internal support washers for strength, “N” Type PTFE socket only, and the best part? this type of TRUE current BALUN offers good choking instead of a 1/1 external unit.
4 Amidon cores: 50 > 200 ohms
All internal fittings have been epoxy bonded and then resin potted
A Mega 37db RL = 1.03 VSWR: Sweep is 0 > 30MHz centered at 15MHz:
Terminated with 200 ohm hi-stabs
Superb construction by the professionals in matching transformers: RFCOMMS 
The only way to make a TRUE GUANELLA CURRENT Balun: Separate cores for each winding
Top quality heavy duty UV Hammond enclosure with gasket in lid
The “TRUE” Guanella current balun, multi core unit.
Nobody does it better than RFCOMMS and something you never get or see before you buy from a shop or manufacturer is the in depth pictures, construction and sweeps we provide, if other manufacturers did the same they would be out of business pretty sharp as half their claims are false, most of them do not know the difference between a Voltage and Current balun, so remember, if the Balun or un/un is made on 1 single core it is a VOLTAGE unit, a TRUE GUANELLA CURRENT Balun is made on 2 or more separate cores and in some cases we have used 12 cores (2 x 6 separated).
CONTACT
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49/1 UN/UN UNITS:
Due to bulk buying of liquidated stock we can now offer the 400w pep 49/1 unit for a crazy Price of £29.99! LIMITED STOCK.
Fitted with Genuine Amidon Fair-rite FT240-43 core with either 14 SWG or Mil grade quality silver plated PTFE wire.
The 49/1 un/un: NO TUNER REQUIRED: A superb single frequency or multi-band unit, A RESONANT End Fed Halfwave antenna un/un offering harmonics from the base frequency, just add your wire, ideal for small gardens, low or high power units available, used by commercial HF users Worldwide with staggering in Country results. Our test unit has been demonstrated many times to Commercial and Amateur visitors showing just how good these units can perform as they offer RESONANCE. With just 10 watts of ssb (Icom IC-705 and TX 599) over 12000 kms has been worked on the higher bands via F2 (21/28MHz) subject to Solar conditions (A & K Index figures). Reunion Island and other islands in the Indian Ocean are worked on a regular basis from here in the UK and that is 8000 kms on 28MHz. Our units are resin potted and UV protected, some use custom made cores (Ni/Zn/F14) and offer a VERY low insertion loss of 0.3db, lightweight and available in BNC/SO239 or “N” type sockets. 25/50/100/200 and 400/1000 (dual core) watts pep versions from £12 to £75
A superb resonant antenna sweep and you can get 6 bands out of it
50MHz RESONANT END FED
Designed by G4ICD many years ago for VHF commercial applications (30 > 75MHz) this version is a “banded” L/C half-wave matching unit with no insertion loss. It provides a superb match with just a Half-wave radiator made of kevlar or a telescopic antenna. Small footprint for qrp or larger versions for high power it is the ideal solution to get on the band and work lots of exotic dx on VHF especially during the Summer months of Sporadic “E”………..prices from £25 
Super match/sweep: 26/5/2023: Wkd 18 Eu Countries on ssb (“ES” opening)
Mini tripod & telescopic vertical version, NO ground or counterpoise required, perfect resonance.
50MHz Resonant end fed verticals, LC version designed by G4ICD for 30 > 75MHz, banded in 3 resonant bands for commercial users: 30 > 45MHz, 45 > 60MHz and 60 to 75MHz. These antennas are very quick to set up and can be on the air in 30 seconds.
50MHz loop fitted with widespaced “C” and capable of 100w pep, slow motion drive, superb sweep: £100.00 last one
Simple and low cost to make, ideal for small gardens.
CONTACT
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CHOKES/LINE ISOLATORS
Mini & Medium format 1/1 chokes, line isolators, noise killers, BNC or SO239 or “N” type, 25/50/100/250/400/1000 watt pep, all PTFE coax wound cores using Zn/Ni or Mn/Zn versions. NO IRON POWDER CORES USED. Prices from £35.00
SPECIAL 1/1 CHOKE/LINE ISOLATOR
A top quality 1/1 unit built with the RIGHT core and the RIGHT high quality coaxial cable. Using the FAIR-RITE FT240-31 Mn core #2631803802 wound with PTFE semi-rigid RG402 coax which uses a solid braid and it does not get better than this. Tested on air with 1kw key down CW. The basic unit is fitted with certified PTFE sockets not cheap Chinese versions, “N” types are optional. Superb returned RF attenuation from 2 > 50MHz and also good for noise reduction on the feedline. Resin potted for stability in UV protected lapped lid enclosure with internal rubber seal and suitable for indoor or outdoor use.
Dipole centre version also available with ceramic insulators as standard, SO239 or “N” type socket
Dipole centres incorporating a Zn-Ni or Mn-Zn core 1/1 choke: Resin potted dipole centres with 1/1 PTFE RG316 coax or RG-402 PTFE high power coax installed, 50/100/200/400/1000 watt pep versions, BNC or SO239 sockets (Special order for “N” type socket), ceramic insulators available
Below: A superb range of commercial professional 1/1 RG316 or RG196 or RG402 PTFE coax dipole centre chokes, ceramic insulators, stainless steel hardware, Marine A4 M6 line/coax stainless support eyes, part resin potted for stability, condensation vent, PTFE SO239 or BNC socket (“N” type available to order), prices from £40 + UK p/p
Top quality made in the UK
Heavy duty ceramic insulators
Great for Doublets, dipoles, etc. Horizontal or vertical formats available
CONTACT
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100 MTR DRUMS OF RS PTFE WIRE: MOD NOS
SILVER PLATED MULTI-STRAND 22 AWG 19/034
IDEAL FOR AUDIOPHILES AND RF WORK
TYPE UL1213: PURPLE: SUPERB FOR HF BALUNS/TRANSFORMERS 400W PEAK
EX MOD £50 PER DRUM (RETAIL £120.00)
1000 MTR DRUMS OF KEVLAR
FULL RACAL SPEC KEVLAR WIRE, UK MADE, LIGHTWEIGHT BUT STRONG! PUT IT UP AND IT STAYS UP!
CLEARANCE ITEMS:
Box of 500 G5RV type dipole centers, could be used as just end insulators, just chop off the screw mount, suit rally dealer, collect only from Southampton, £100 the lot, provisionally sold.
FT767GX 145MHz POWER MODULES: Last 1 Left (but I know where there is more of these) from Yaesu spares stock, genuine item in static sensitive wrapping, brand new, Yaesu part # G1090295 M57713 Japan £25.00 each
