Dr Alex UR4LL has quite a few
Russian electronics parts and some equipment for sale. The list is updated periodically, and
some items have pictures (click on links for details and/or pictures of each item); (Email
for details). If your email program does not pick up the "UR4LL" email link, his address is
"ur4ll" followed by "@" and "bk.ru". Alternate email addresses are
"ur4ll" followed by "@" and "gmx.com" or
"ur4ll" followed by "@" and "aim.com".
It is also possible to contact Dr Alex via SKYPE, address "alexgavva".
NOTE: For Russian bipolar transistors , FETs, ICs, etc, contact UR4LL directly with your inquiry.
1500+W thru 432 MHz new in box - $120
Coaxial resonator PA for GS35b.
OK for 432MHz,minimal hours in use, perfect shape. Schematic available. Weight without tube 22kg.
Price without tube $300 shipped to Europe and $320 shipped to USA.
Almost identical to GS-35B except 1KW anode instead
of 1.5KW, and designed for almost TWICE the tube life 1200W out thru 432 MHz.
Original factory package. - SOLD
(NOTE from ND2X: Two GS-31B triodes will outperform a pair of 3CX800's at less than 20% of the cost).
300W on HF to 432MHz, >100 W on 13cm
cavity design) - $10 without cooler, $15 with cooler
GI21B, 110 W on 8.5cm - $10 and its socket - $8
GI7B & GI7BT 300-400W, HF to 300MHz; 250W thru 23cm) - $25
SOCKET for GI7B - $25
GI6B identical to GI7B
except rated to 1300MHz instead of 3GHz; use same as GI7B - $20
GU5B 2.5kW triode (3.5kW on HF) - $110
GU48 kW glass triode. OK for HF and for audio as well. - $80
GU56 good for kW to 40MHz - $90
811 $25 per pair
GMI-11 compact tetrode - low height 500W tetrode - tube $90, socket $15
GMI-83B with socket similar to
GMI-11 tetrode and all GMI -11 PA designs are OK for this tube. Heater 25V@2.5a. Plate voltage 1200-1900V. 2 tube
with 1900 V plate voltage are OK for 600W output. See
picture for 3-tube KW PA - tube $30, socket $7
G807 ( 807) beam tetrode - $9
813 - $30; sockets - $15
Two of these tubes run 1kW without cooling and the associated blower noise.
GK71 - $30; sockets - $12
Two of these tubes run 1kW without cooling & associated blower noise. Equivalent to 471 (or RS-471?).
6P45S Tube - $15 / Socket - $2.
This is a sweep tube, similar to PL519 except the heater voltage is 6.3V.
500+ W on 23 cm in KD5FZX PA design - $15.
Socket - $20.
Coaxial resonator PA with GS15b (Good for 432MHz) with air
cooling fan. Schematic available -$150.
GU19B tetrode - $10; sockets - $15
This tube works on 2m.
1.5KW on 70cm; N7ART, KD5FZX, K5GW
PAs (same as 4CX1600U; similar to YL1050) - $140
Same as 4CX400A; Is direct plug-in on/to 4cx150 to 4cx400 family. Ken, KM3F runs 500W with a single GS36b on 6m in place of original 4cx250b tube. - $65
$10, socket $5 This is a small glass tetrodes widely used in Eastern Eu for building 100W PA; roughly equivalent to
SRS4451, QQE06/40, RS1009, 5894, CV2797, 829B
GU34B - $40 Socket - $65
Tube is NIB, passed military control. Works up to 250 MHz, Ua max 2.5kV. Base similar to GU43b. See
YU1AW information for use on 2M (scroll to bottom
of page). It will do 1KW on HF with no problem. Sometimes it works better than GU74b. Schematics are available at:
1. http://ra3ggi.qrz.ru/OTHER/3.htm 2. http://www.qrx.narod.ru/hams/um_gu34.htm
GU35B - $200
Good through 250 MHz,Anode dissipation rating 3.5kW, Ua max 5kV.
It's easy to build a socket for this tube: GU35B basement - Note that the central pin is Grid 1.
GU39A-1 water cooled tetrode,8kW up to 100MHz - $200
GU39B-1 air cooled tetrode , 6kW up to 100 MHz - SOLD
GU43BNOTE: OK for HF-6m, similar to 4CX1600; 1600 W up to 100 MHz. - $70
socket - will sell with tube only - contact UR4LL
GU47b 6kW HF tetrode Tube - $350
GU74b 250MHz (4CX800a equivalent) tetrode Tube - $100-$120
GU-74B socket with anode clamp - $70
SK1a Socket for GU-74B - $30
NOTE: GU78B Tube - $450
Socket for GU78B tetrode - $140
GU84b tetrode - $390
Socket for GU84B - $150
GU46 pentode (exclusively linear tube) - $80
800-1000W, similar to 4-1000A or QB5/1750
GU50 pentode (analog of German LS50)-$10, socket $7
GU81M - $65, socket - $35
Two of these tubes run 3kW without cooling and the associated blower noise. See schematic.
1.5kW pentode (click for spec sheet) - SOLD, socket - $50
GM5B audio triode - $40 (socket is available)
6C33C audio triode - ( 6S33S) - $20. Sockets are
available -$5. It is easy to find data and schematics if you Google 6C33C
6N1P double triode. Equal to E88LC,6DJ8,6922. $3
6N9S double triode. Equal to 6SL7GT,6SL7,1579. $3
6N24P double triode. Equal to 6FC7,ECC89. $3
1. Motor-Driven Antenna Tuner
top cover available; water-proof - $80
2. Dural Box from Antenna Tuner - $20
||Click on pictures for zoom
3. BLOWER - $45
4. Neon TH20 and TH30 bulbs - the best RF indicator -$2
5. Antenna Mast Guys Steel cable with insulators, 10-15m long (4pcs on bobin) - $40
NOTE: These cables are able to be loaded up to 1.1 ton ( or abt 2300lbs) before failure.
6. PL26-1PD sockets for GMI-11 tetrode - $15
7. Ceramic Coil Forms - $6
8. Thyratron TGI 1-1000/25, 1000A@25kV - $100
(A thyratron is a type of gas filled tube used as a high energy electrical switch and controlled rectifier)
9. RF Probe Use with RF transformers - $4
10. Russian Straight Keys - $15 each
11. Hi-Quality Aviation use rotator
OK for small antennas,etc, 100kg/cm strength, 12-27VDC. - $65
12. 1kW Russian military 50 ohm Dummy Load - $170 each
13. RF Unit from Russian Military station
( OK for 1kW) with coil, variometer, bands switch, tuning knobs, etc. - $270 each
Toroidal RF Transformer - SOLD
Large RF Transformer 1-300MHz, up to 4kW - $65
Small RF transormer - $10
TH46, 58W, 220-240/110-127V prim, secondary 4x6.3V@2.65A - $22
TH5 . Prim 220-240/110-127V, secondary 6.3V@0.55A and 6.3V@5A - $17
TH55, 98W, 220-240/110-127V prim, secondary 2x6.3V@0.87A + 2x6.3V@8A - $25
TH8, 58W, 220-240/110-127V prim, secondary 2x6.3V@5.4A - $25
TH58, 122W, 220-240/110-127V prim, secondary 3x6.3V@6.3A + 6.3V@3A - $30
TH61, 190W, 220-240/110-127V prim, secondary 3x6.3V@9.2A+6.3V@7A - $35
#1 - primary 220-240V, secondary 900-1000v @~0.9A - $80
#2 - primary 220-240V, secondary 900-1000v @~0.9A - $100
TA50 - 26W, prim 220-240/110-127V, 58mA secondaries 200+200,180+180, 20+20 V - $20
TA178 - 110W prim 220-240/110-127V, secondary (28+28, 28+28)V@1A & (6+6V)@0.9A - $25
TA274 - prim 220-240/110-127V, secondary (80+80, 56+56)V@1A & (14+14)V@1A - $30
TAH69 - prim 220-240/110-127V, secondary (28+28,28+28)V@1A & (6.3+6.3)V@0,71A - $30
METERS: Size is 60x60mm, requires 50mm diameter wall hole - $20 each
3A current meter with RF probe NIB - $25 each
High quality aviation use relays OK for
GU74B/4cx800a HF finals. $80 per 5pcs
NOTE: Single units are also available, $20 each
Small Antenna Relay - $10
>1000 W (for HF) open-frame relay, 24-27VDC coil (use for HV, e.g. 3kV 2A is no problem; NOTE: 20A at 30 MHz ) - $15
Plate with two installed - $30
Plate with four installed - $60
RF Relay: Small size open frame relays (OK for GU74b); It is
possible to use these relays for Pi circuits with 1 kW and more. See
picture these relays used in 1 kW PA - $15
RF Relay: Open frame 2 position relays. Using a pair of these
relaysit is possibly to build 5 bands switcher for Pi-circuit. It has neutral position if it is tongue directed to down, I kW it is not a problem for
it. Russians call it "tongue of my mother-in-law" - $20 new, $15 used, close to new
1500 W (thru 650 MHz) 75 ohm coaxial relay with 3 cable connectors - $23
writeup for notes on using this relay in 50 ohm PAs, especially
HF and 6M - no sweat!!
1500 W (thru 650 MHz) 50 ohm coaxial relay with 3 cable connectors - SOLD
REW16 500W (thru 1000 MHz - usable at 1296MHz) 50 ohm coaxial relay with 3 cable connectors - $35.
REW17 75 ohm relay, works up to 23cm - $25.
B1B Vacuum Relay, 3KV, 10A at 30 MHz - $20 each
2 B1B Vacuum Relay on plate - $40
B2B Vacuum Relay, 4KV, 15A - NIB -
4kV@15A relay @ 30 MHz, 5.5kV@35A relay @ 3Mhz. Its coil is 6-16VDC - $30 each
polarized RF relay; input circuits of HF PA with 80-100W or more, 30-40W up to 150 MHz - 13 VDC coil models -$6 and 27VDC coil models- $5
100 Ohm 10W non-inductive - $3 each
150 Ohm 10W non-inductive - $2 each
100 Ohm 60W non-inductive - $10 each
Two 100 Ohm 60W non-inductive resistors on a plate - $10 each
Five 50 Ohm 10W non-inductive resistors on a plate - $10 each
(Using 5 plates it is possibly to easy build 50ohm 250W dummy load.)
75 Ohm 25W non-inductive - $3 each
51 Ohm 20W non-inductive - $4 each
50 Ohm 25W non-inductive - $5 each
17 Ohm 25W non-inductive - $2 each
NOTE: Using 3 of them is easy to build 25W 50ohm dummy load.
17 Ohm 50W non-inductive - $5 each
17 Ohm 100W non-inductive Use 3 of
them to build 50ohm 100W dummy load. - $10 each
25 Ohm 200W non-inductive Use 2 of
them to build 50ohm 200W dummy load. - $10 each
Big Ceramic Insulator - $3 each
Ceramic sticks with electrodes - $10 each
Ceramic Antenna Insulator: Front / Back - $6 each
Inverted-V dipole or high power wire Antenna Insulator - $20 each
Antenna Insulator - $8 each - Good for high power.
Antenna Insulators - Ceramic (pictured top, $1 each, pictured bottom, $1.50 each)
Antenna Insulators (used by military) - $5
Antenna Insulator - $10 each - General Purpose antenna insulator.
BIG Antenna Insulator - $20 each - General Purpose antenna insulator.
More Feedthrough Insulators - $3 each
Big Feedthrough Insulator - $10 each
12.5pF 10kV - $9
25pF 15kV - $9
50pF 15kV -$10
100pF 15kV - $10
150pF 15kV - $13
200pF 15kV - contact UR4LL
250pF 15kV - contact UR4LL
300 pF 15 kV - $15
Vacuum Variable capacitors:
5-100 pF 25 kV 75A - $105
3-50 pF 25 KV max dia. 75mm, max len. 179mm (with shaft) - $50
4-100 pF 5 KV Compact vac var capacitor 4-100pF 5kV - contact UR4LL
5-100 pF 25 KV 50 A max dia. 87mm, max len. 191mm (with shaft) - $65
5-250pF 5KV max dia. 70mm, max len. 156mm (incl shaft) - $105
10-200 pF 25 KV - $105
10-500 pF 10 KV max dia. 115mm, max len. 254mm (with shaft) - $110
7.5-350pF 10kV max dia. 100mm, max len. 249mm (with shaft) - $100
15-350pF 25kV 75A - $120
15-750pF 5KV max dia. 108mm, max len. 200mm (incl shaft) - contact UR4LL
(measured capacity is 10-780pF)
20-1000pF 10KV max dia. 145mm, max len. 278mm (incl shaft) - contact UR4LL
w/mounting hardware & turns counter
10-1200pF 4KV max dia. 96mm, max len. 200mm, w/turns counter - contact UR4LL
7 Position Switch with motor - $45
7 position band switch - $30
5 position large 2 wafer ceramic switch - $27
25 position 2 wafer switch - $12
11 position, ceramic: 1 wafer - $3; 2 wafer - $4; 3wafer - $5; 4wafer - $6; 5 wafer - $7
Used by Russian Hams in GS-35B amplifiers.
See picture for an application.
Heavy Duty switch #1 Good to 5KW - $35
Heavy Duty switch #2 Good to 5KW - $25
R-140 radiostation band switch - $40
GOOD FOR 5KW - it has 15 each RF HV capacitors on it
Roller coil with integrated turns counter - $65
Compact Roller Coil - SOLD
High quality 22 turns roller coil, OK up to 1 kW - $50
4.5kW Variometr from R-140 station - $80
1kW Variometer from R-118 statiion - $50
Variometer with motor #1 - $65
Variometer with motor #2 - $55
roller coil with one motor - $80
roller coil with choke and two motors - $80
Roller coil with choke - $50
Variable Coil - 8 turns, 20-60 MHz 1.5-2.5 kW. - $45
New variometers - $30 each
Variable Coil with switch inside OK for 1-5kW - $65
Roller Coil 22 Turns, made from 1cm width copper strip - contact UR4LL
Middle-Sized Roller Coil, with turns counter - $75
HUGE Roller Coil, with turns counter - $110
Large Roller Coil 38 Turns, made from 1cm width copper strip - $70 without turns counter, $80 with turns counter.
Roller Coil with turns counter - $60
Roller Coil with relay - $50
Small Variometer - $25
New (Jun08) Variometer #1 - $40
New (Jun08) Variometer #2 OK for 137kHz with reductor and scale - $50
High Quality Variometer on Ceramic Frame - $40
22 turn fixed coil with taps - $35
4pcs high quality coils on plate - $20 or $5 each
4pcs high quality coils in box - $30
27 turn coil made from 1cm cooper strip (11cm OD) - $45
13 turn coil made from1cm copper strip (11cm OD) - $35
9 turn coil made from 1cm copper strip (11cm OD) - $25
8.5 turn coil, 8cm OD - $20
10 turn coil, 7cm OD - $20
8 turn coil, 7cm OD - $18
6 turn coil, 7cm OD - $15
2 layer coil, 16 turn inside & 8 turn outside - $25
9 turns teflon fixed value Coil - $7
Fixed Value Coils - $20 (left) & $10 (right)
Coils on acrylic forms
Coil made from 7mm diam silvered rod
Coil made from 10mm diam silvered tube
Coil made from 12mm diam silvered tube - $40
42 turn coil on ceramic form - $15
RF Chokes - contact UR4LL
8t tapped coil for power on higher HF bands - $20
Zener Diodes Approximately 8W:
D815A - 5.6V@1.5A - $0.25
D815B - 6.8V@1.2A - $0.25
D815W - 8.2V@1A - $0.25
D815D - 12V@650mA - $0.25
D815E - 15V@550mA - $0.25
D816W - 27V@180mA - $0.25
D816G - 39V@130mA - $0.25
D816D - 47V@110mA - $0.25
D817B - 68V@75mA - $0.25
D817A - 56V@90mA - $0.25
D817W - 82V@60mA - $0.25
D817G - 100V@50mA - $0.25
Aluminum Box OK for building PA in - email for price.
Dynamic Russian stand microphone with stand, new in box - $15
All parts are "new off shelf, old stock," never used, unless otherwise noted.
Prices are in USD, but payment in Euro, GBP and AU$ ( Australian dollars) are also acceptable at current exchange rate.
Delivery period to Europe is about 5-7 days; to US, shipment takes about 8-12 days.
Shipping is not included in cost shown; contact UR4LL for shipping cost.
73. Alex, UR4LL.