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Svetlana Tubes
• Minimum Order: $25.00 in Parts
• Product Returns are subject to 15% Re-stock fee. 





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    Svetlana Application Notes
    
    
  

  



  The following list of Application notes can be ordered from RF Parts. All are printed copies. 

  		
  



Part Number
Bulletin
Subject
Price Ea.




SVETAP1
No. 1
Using the Svetlana 4CX400A on 432 MHz

    By Fred Stefanik, N1DPM		
$ .25




SVETAP2
No. 2
Service Tips for the 30L-1 811A Amplifier

    By Dean Battishill, W5LAJ		
.25




SVETAP3
No. 3
Modifying the Svetlana SK3A socket to isolate the cathode from the chassis.

    By George Daughters, K6GT		
.25





SVETAP4
No. 4
High Efficiency Power Amplifier Design.

    By Jerry Kleker		
.25




SVETAP5
No. 5
Svetlana 4CX400A improves 8930 VHF Amplifiers

    By Ron Klimas, WZ1V		
.25




SVETAP11
No. 11
Using the Svetlana 3CX300A1

    By Eric Barbour		
.25




SVETAP13
No. 13
The 811A: Grandfather of the Zero-Bias Revolution

    By George Badger, W6TC		
.25




SVETAP14
No. 14
4CX400A Russian Tubes for the MLA-2500 Amplifier

    By B.N. "Bob" Alper		
.50




SVETAP15
No. 15
Technical Topics (572B); modification of FL2100B & FL2100F Linears to correct insufficient cut-off bias.

    By George Badger		
 .50




SVETAP16
No. 16
Power Tube Taste Test (Guitar Player Nov 96 pg.118); EL34, 6L6

    Art Thompson		
.50




SVETAP17
No. 17
The Collins 30L-1 Amplifier Revisited

    By Bill Orr		
.25




SVETAP18
No. 18
Quarterly Devices: new Devices for Linears

    By Rick Littlefield, K1BQT		
.50




SVETAP19
No. 19
New Life for Dentron MLA-2500s

    By George Daughters, K6GT		
1.00




SVETAP20
No. 20
Power on a Budget: Using the Russian Svetlana 4CX1600B power tetrode in modern amplifier designs (from Communications Quarterly magazine, Winter 1995)

    By Marv Gonsior, W6FR		
.50




SVETAP21
No. 21
Vacuum Tubes are Aglow Again (from Electronic Engineering Times magazine, July 8, 1996)

    By Ron Wilson		
.25




SVETAP24
No. 24
The Heathkit Warrior Updated Plus 160 Meters (from CQ magazine, November 1997)

    By Paul Carr		
.25




SVETAP25
No. 25
The Sunnyvale/St. Petersburg Kilowatt-Plus

    By George Daughters, K6GT		
.50




SVETAP31
No. 31
4CX1600B Power Amplifier for FM Broadcast

    By Raymond Feeney		
.25




SVETAP32
No. 32
Save Your Dentron GLA-1000 with the Svetlana EL509

    By George Badger, Bob Alper, and Eric Barbour		
.50




SVETAP34
No. 34
A Single Triode 350 Watt Power Amplifier with the Svetlana 572B Tube (translations from article published in the Spanish CQ Magazine, August 1997)

    By Xavier Paradell		
.50




SVETAP35
No. 35
The Care and Feeding of the 4CX1600B (from Communications Quarterly magazine, Spring 1998)

    By Dean Battishill		
.50









  

    The Svetlana 57B Tube
  

  

        The Svetlana 572B is a high-mu power triode intended for use in Class AB, Class B and Class C, RF and audio amplifiers. This new tube features a low-loss white ceramic base and a bonded white ceramic plate cap thermal insulator for high power RF transmitting capability. Temperature-initiated titanium "getter" material is permanently embedded in the surface of the rugged graphite anode for superior gas absorption. This improved "getter" system operates continuously at high temperature, and is over six times more effective than flash getters silvered on tube's glass envelope.

    The 572B may be used as a direct drop-in replacement in linear amplifiers using the 811A. Reliability will be enhanced by the upgraded overload capability of this rugged graphite plate tube.

    High-quality fabrication and vacuum processing at high temperature enables Svetlana to manufacture the new 572B with consistent performance and extended life.



    		
  

  

    Yaesu FL2100B Amplifier Tubes
  

  

    
    We find that this amplifier exhibits susceptibility to spurious oscillations. Originally, the U.S. 572-B tubes had mu (µ) of 170 or less, and would work fairly well if care was exercised in tune up (see owners manual). Cetron & Taylor Electronics brands work satisfactorily.

    The quality 572B tubes manufactured by Svetlana have greater amplifications factor (µ), and may cause the "conditionally stable" FL2100B to break into oscillation due primarily to insufficient cutoff bias.

    The newer version Yaesu FL2100Z incorporates design changes which alleviate many of the problems found in the "B" version. A few minor modifications can be made to the FL2100B to tame it down, i.e. changing the bias supply from a half-wave to voltage doubler. We recommend this improvement for all FL2100B regardless of tubes used. Modification information and "mod kit" is available from RF Parts.

      Modification Kit Part Number: FL2100-1Kit     •      $2.50 ea.		
  








  
 






  

    
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