SPECTRUM COMMUNICATIONS

Quality English products hand-crafted to order

       

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COMPONENTS - 19 August 2020

Proprietors;- Mr A.J. Nailer HNC BA G4CFY, Mrs J.R. Nailer. 

12 WEATHERBURY WAY, DORCHESTER, DORSET, DT1 2EF, ENGLAND

Phone UK 01305 262250 International 0044 1305 262250

Please email or phone for a quote or for a Paypal money request or for bank details. Payment can be by direct bank transfer or by credit/debit card or via Paypal to g4cfy@spectrumcomms.co.uk  together with a note stating product required. Purchase of several items is likely to make a saving on postage. You can also obtain products by using my Ebay shop https://ebay.co.uk/str/Spectrum-Comms and pay via Paypal.

Orders & quote requests to  jean@spectrumcomms.co.uk

Technical queries to  g4cfy@talktalk.net

 P&P on all orders £1.80 minimum, otherwise according to weight or size, email for a quote.

CONTENTS

PTFE Feedthroughs Ferrite Binocular core Field Effect Transistors, junction type
Polyvaricon Tuning Capacitors Ceramic 2 pole 5 way Switch Dual Gate Mosfets, 40673, 3N201, etc
Spectrum 10mm Coil (TOKO replacements) Power Relay IF Filters, crystal, ceramic, & ladder
Capacitors, fixed and trimcap Resistors, fixed and trimpot Crystals, new & S/H, HC18U, HC49U, etc
Dust Iron Toroidal Cores Diodes, signal, varicap, zener, rectifier Integrated Circuit, Op Amps, & RF/IF, etc
Ferrite Toroidal Cores Transistors, small signal, AF, IF, RF power Valves, B7G, B9A, & Octal

NEWS UPDATE.  The new high precision, low temperature coefficient 10mm coils for IF, RF, and Oscillator use are now in stock.

 PTFE Feedthrough.  High quality silver plated PTFE feedthrough to fit into panels up to 1/8" (3.2mm) thick.  Flashover voltage at sea level 4kV.  Top pin 0.04" (1mm) diameter 0.19" long. Bottom pin 0.04" (1mm) diameter 0.17" long. Fits into 3.5mm hole. Price 40p each, any quantity. P&P £1.80 1-25qty.

Feedthrough small.jpg

PTFE FEEDTHROUGH

      

POLYVARICONS

Polyvaricons 280pF + 280pF + 20pF + 20pF, size 22x22x18mm with 18mm long 6mm diameter tuning shaft.  1-99 £2.00 each, 100+ £1.50 each. P&P £1.80 min.  

Polyvaricons 66+155pF, size 21x21x10.5mm with 18nn long 6mm diameter tuning shaft. 1-99qty £1.75 each, 100+ £1.25 each. P&P £1.80 min.

Polyvaricons small.jpg

NEW HIGH PRECISION HIGH STABILITY 10mm RF/IF/OSC COILS

These coils supplement the existing Spectrum coils and are distinguished by an extra H in the purchase code.  They are matt tin plated bras instead of bright nickel plated brass.  The tuning range is smaller and the inductance tolerance and temperature coefficient are much tighter. Price 1-99 £1.00, 100+ £0.80.

L uH

TYPE

uH min

uH max

Q

F MHz

T 1-2

T 2-3

T 1-3

T 4-6

0.6

0u6HL

0.4

0.9

60

50

3

3

6

1

1.2

1u2HL

0.7

1.4

69

28

2

6

8

1

1.2

1u2HH

0.7

1.4

66

28

4

4

8

2

1.7

1u7HL

1.0

2.4

47

14

2

8

11

1

2.6

2u6HL

1.9

4.5

57

10.7

3

11

14

1

2.6

2u6HF

1.9

4.6

57

10.7

7

7

14

2

2.6

2u6HH

1.8

4.6

57

10.7

5

7

12

3

5.3

5u3HL

2.9

8.2

58

7

5

15

20

1

5.3

5u3HH

2.8

8.2

56

7

10

10

20

4

11

11uHL

6.7

17.6

46

3.6

7

23

30

2

23

23uHL

11.7

28.6

52

1.9

9

31

40

3

45

45uHL

24.6

62.8

62

1.9

14

42

56

3

90

90uHL

47.2

112.0

68

1

19

57

76

5

 

SPECTRUM 10mm RF/IF COILS   

  Spectrum 10mm coils, replacements for popular TOKO coils.  These coils are ideal for RF and IF stages but not suitable for high stability oscillator circuits.  A new range of close tolerance high stability coils with low temperature coefficient suitable for oscillators will be available in December 2019.

Prices 1-99 80p each, 100+ 60p each. P&P £1.58 minimum.

Spectrum coils small.jpg 
    (9371 bytes)Coil.jpg (6121 bytes)

L uH

TYPE

TOKO

C pF

F MHz

T 1-2

T 2-3

T 1-3

T 4-6

Q

Z pri

Z (1-2)

Z (2-3)

Z sec

0.6 0u6H     50 3 3 6 1 75 14137 3534 3534 392
1.2 1u2L     28 2 6 8 1 85 17944 10093 1122 280

1.2

1u2H/1R2

3335R

0

28

4

4

8

2

85

17944

4486

4486

1121

1.7

1u7L

4612

0

14

2

8

10

1

45

6729

4306

269

67

2.6

2u6DC

586

82

10.7

0

0

12

0

100

17479

0

0

0

2.6

2u6L-I

 

 

10.7

3

11

14

1

85

14857

681

9172

75

2.6 2u6L-R     10.7 11 3 14 1 85 14857 9172 681 75

2.6

2u6FC

3892

82

10.7

7

7

14

2

80

13983

3495

3495

285

2.6

2u6HC

3893

82

10.7

7

7

14

3

80

13983

3495

3495

642

5.0

5u0L

3337R

0

7

2

23

25

3

50

10995

70

9306

158

5.3 5u3L   0 10.7 15 5 20 1 85 19814 11145 1238 49

5.3

5u3H

3334R

0

7

10

10

20

4

85

19814

4953

4953

792

9

9uH

2027

0

5

3

0

28

5

70

19792

227

0

631

11

11uL

 

0

3.6

23

7

30

2

80

19905

1083

11699

88

23

23uL   0 1.9 11 37 48 3 50 13728 8156 720 53

45

45u0L

3333

0

1.9

42

14

56

3

60

32232

2014

18130

92

90 90u0L   0 1 57 19 76 5 65 36756 20675 2297 159
105 105u0L 10E 0 1 42 14 56 3 85 66759 37551 4172 191

Inductance, frequency, and capacitance guide. 

0.6uH F MHz 70 50 29 21   11uL F MHz 10 7 3.65 1.84
  C pF 8p2 18 56 82     C pF 22 47 180 680

1.2uH

F MHz

29

24

21

18

  23uH F MHz 7 5.3 3.65 1.85
 

C pF

27

39

47

68

    C pF 22 39 82 330
1.7uH F MHz 21 18 14 10.7   45uH F MHz 5 3.65 1.85 1
  C pF 33 47 82 120     C pF 22 47 180 560
2.6uH F MHz 18 14 10.7 9   90uH F MHz 3.65 1.85 1 0.455
 

C pF

33

47

82

120

    C pF 22 82 330 1500

5.3uH

F MHz

14

10

7

3.8

  105uH F MHz 3.65 1.85 1 0.455
 

C pF

27

47

100

330

    C pF 18 68 270 1200

 

VHF 10mm COILS

Replacements for TOKO MC120 types 100112 and 100076.

Spectrum coils SC112 70nH, and SC076 220nH.

Prices 1-24 80p each, 25-99 65p each, 100+ 50p each. P&P £1.80 minimum.

Coils.jpg

 

 

       CAPACITORS

        Ceramic 50V NPO: 1pF to 390pF, all 10p each.

       Ceramic multilayer 50V CGO 470pF, 560pF, 680pF, and 820pF all 10p each.

       Ceramic 50V N150: 30pF, 47pF, 56pF, 68pF, 180pF, 1nF, 1n5 2n2, 3n3, 4n7, 10nF, 22nF, 47nF, all    10p each.

       Ceramic 50V Hi-K: 1nF, 1n5, 2n2, 3n3n, 4n7, 10nF, 22nF, 47nF, 100nF, 10p each.

       Ceramic N150: 10nF 500V, 100nF 50V 20p each.

       Electrolytic radial small 25V: 1uF, 2u2, 4u7, 10uF, 22uF, 47uF, 100uF, all 20p each.

       Electrolytic radial medium 25V: 220uF, 470uF, 40p each.  1000uF 75p.

       Electrolytic axial 2200uF 35V £2.00.  4700uF 35V £3.00.

       Mica 350V 10pF, 33pF, 39pF, 47pF, 68pF, 100pF, 120pF, 330pF, all 75p.       680pF & 1nF £1 each.

       Polyester block 7.5x7.5x2mm 63V: 1nF, 2n2, 4n7, 10nF, 22nF, 47nF, 100nF, all 15p each. 220nF & 470nF 30p each.

TRIMCAPS

Murata style 2-5pF blue, 3-10pF white, 5.5-20pF red, 6.5-30pF green, 12-50pF yellow;  70p each 1-9, 60p each 10-99, 50p each 100+.

Tetfer 10pf & 15pF £1.00 ea;  Phillips/Vishay 5.5-65pF yellow; £1.80 each. 

         

      DUST IRON & FERRITE TOROIDAL & BINOCULAR CORES

 TOROIDAL CORES 

Dust Iron Cores, T37-2 40p, T50-2 45p, T68-2 55p, T130-2     £2.00.  T37-6 45p,  T50-6 65p, T68-6 95p, T130-6 £3.25, P&P at cost £1.80 minimum.   T200-2 £5 P&P £3.50. Design Data sheet

Ferrite Cores, FT37-43 40p, FT50A-43 75p, FT37-61 85p, FT50A-61 £1.30.   Ferrite bead RL452, like FX1115, 4mm OD, 5mm long, 2mm ID, 10-99 8p ea, 100+ 6p ea. P&P at cost £1.80 min. FT140-43 £3.00 ea. P&P £3.50 (1-5qty).

BINOCULAR FERRITE CORES 

Ferrite Binocular Cores, BN-Width-Length-Ferrite: BN1307-43 55p,  BN1310-43 75p, BN1313-43 80p, BN2025-43 £2.25, BN1307-61 80p, BN1310-61 £1.00, BN1313-61 1.25p,  P&P at cost £1.80 min. Design Data Sheet

Ferrite cores 
      small.jpg

Cores are painted yellow for type 43 and blue for type 61 so you will never get them mixed up again.

 

    

Ceramic switch front sm.jpg

Ceramic switch rear sm.jpg

CERAMIC SWITCH

Single wafer with two single pole 5 way switches, non shorting.  Suitable for legal limit amplifiers and antenna tuning units.  £6.00 each plus £3.50 P&P.

     

POWER RELAY

Double pole double throw. Suitable for HF linear amplifier up to 2kW rating.  Supplied with 4mm chassis fixing screw. Coil 12/13.5V at 140 Ohm.  Size 43(L) x 30(W) x 30(H).

£3.00 each plus £3.50 P&P.

Relay small.jpg (11217 bytes)

 

RESISTORS & TRIMPOTS

   1/4W carbon film: 1 Ohm to 1M Ohm, all 2p each,

  Trimpot 100mW horizontal: 100, 220, 470, 1K, 2K2, 4K7, 10K, 47K, 100K, 470K, 1M, all 30p each.

   Trimpot 100mW vertical: 470, 1K, 2K2, 4K7, 10K, 25K, 47K, 100K, 470K, all 30p each.

Resistors small.jpg (8258 bytes)

       CONNECTORS  PL259, N type, BNC, microphone connectors etc., click Connectors

       DIODES

       Rectifier: 1N4001 10p, 1N4007 10p,1N5401/6 30p.

       Detector diodes: Tested Germanium diode like OA81, IN61A, tested & batched packs of 5 £3.00.

       Matched set of 4 germanium diodes for ring mixer £3.00.

       Small Signal: BAT42 Schottky 15p, FH1100 UHF 25, 1N4148 5p.

       RF Switching diodes: BA243 and BA482 20p, M1301 75p.   

       Varicap BB505G 2-20pF 75p, BB809 10-40pF 75p, KV1236 20-420pF £4.00.

       Zeners 100mW: 2v7, 5v1, 6v2, 8v2, 9v1, 10v, 16v, all 10p.

       Diode bridge: W005M £1.00.  8A bridge £2.00.

       Diode ring mixer: HPF-506X-1 like SBL-1X £7.50.

       TRANSISTORS

       Bipolar AF: BC109C, BC548B, BC148B, BC157, BC557, BC182L, all 15p each.

       Bipolar RF: BF195, BF199, 25p each, 2N2369A/BSX20 50p, 2N918 2N5179 £1.00, 2N4427 £1.50.

       Bipolar Power RF: KT290b like 2N6080, MRF239, SD1274 £25 each. BLW60 £30. P&P £2.00

       FETS TO92 package      

TYPE Freq MHz Gfs mmhos Vgs off Idss mA NF dB PRICE
BF256B 100 >4.5 -3 to -4 6-13 1 50p
J304 100 4.5-7.5 -2 to -6 5-15 1.7 75p
J309 450 10-20 -1 to -4 12-30 2.7 75p
J310 450 8-18 -2 to -6.5 24-60 2.7 75p

       MOSFETS    

TYPE PACKAGE Freq MHZ Gfs mmhos Idss mA NF dB PRICE £
3SK45 TO72 200 14 17 2.2 3.00
3N201 TO72 300 12.8 15 2.0 3.00
40673 TO72 400 12 15 3.5 3.00
BF964 SOT103 800 18.5 10 1.0 1.50

       FILTERS

  455kHz 2 pole mechanical filter, -6dB Bw 10kHz, -30dB Bw 200kHz, term 2k, HCFM2 455D 50p.

  455kHz 4 pole piezo-ceramic, -6dB Bw 6kHz, -40dB Bw 18kHz, term 2k, LT455HTW £2.50.

  10.7MHz 2 pole crystal filter-3dB Bw 7.5kHz, -20dB Bw 36kHz, term 1k8 & 6pF, 10G7A £3.00.

  10.7MHz 2 pole crystal filter, -3dB Bw 15kHz, -15dB Bw 50kHz, term 3k & 2pF,10M15A £3.00.

  10.7MHz 2 pole ceramic filter, -3dB Bw 50kHz, -20dB Bw 200kHz, term 330R, SFE107MT £1.20

  10.7MHz 2 pole ceramic filter, -3dB Bw 220kHz, -20dB Bw 350kHz, term 330R, SK107M5A0 £1.20

  10.7MHz 2 pole ceramic filter, -3dB Bw 360kHx, -20dB Bw 720kHz, term 330R, SK107M0A0 £1.20

9MHz & 10.7MHz SSB IF FILTER 

A 6 pole crystal ladder SSB filter with impedance matching toroids. Termination 560 Ohms and less  than 5pF.  Bandwidth 2.3kHz at -6dB,Shape factor 2.6:1. Insertion loss 2dB.   PCB size 60 x 27 x 15mm.  State which intermediate frequency is required when ordering.  Price £21.50 UK, £23.50 EU, £24.50 World.  Carrier crystals £3.00 each.  Prices including carriage.      

       CRYSTALS      Link       P&P £1.80 per order.

New stock HC49/U, parallel resonant mode 25pF or 30pF load, series resonant third overtone infinite capacitance, all at £3.00.

Used or old stock HC18/U, HC25/U, & HC49/U, parallel mode 25pF or 30pF loading, 3rd overtone, 5th overtone and 7th overtone series     resonant £1.50 each.   

      INTEGRATED CIRCUITS  IC list    

      VALVES, B7G, B8A, B9A, Octal, B8B, and pins   Valve list  Prices range from £2 to £15.  UK P&P at cost.