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Diamond

RF Parts is a Major Stocking Distributor for Svetlana
and other Transmitting & Broadcast tubes.
Same day shipping on most tubes. Call for quote.

Svetlana power tubes are new to the Western world, however, they have been manufacturing power tubes in St. Petersburg Russia since the beginning of the technology. Svetlana began manufacturing electric light bulbs over one hundred years ago, and was among the earliest vacuum tube manufacturers. With a rich history in the technology, Svetlana is the largest power tube designer and manufacturer in the world, with a wide variety of power tubes up to the level of 1 Megawatt CW. Svetlana tubes are of the highest quality, backed by the strongest warranty in the industry.

Tube Number	Specifications	List Price	Price Each
572B-MP	Matched Pair		Call
572B-M3	Matched/3		Call
572B-MQ	Matched Quad		Call
3CX400A7			Call
4CX400A			Call
4CX800A			Call
4CX1600B			Call
SV572-3			Call
SV572-10			Call

TH5-6	3CX800A7	3CX10000H3	4CX250BT/Y497	4CX7500A
TH6-3	3CX2500A3	3CX15000A3	4CX250R/7580W	4CX10000D
TH6-3A	3CX2500F3	3CX15000A7	4CX350A/8321	4CX15000A
812A	3CX2500H3	3CX15000H3	4CX350AC	4CX15000J
833A/833C	3CX3000A7	3CX20000A7	4CX1500A	4CX20000A
8161R	3CX3000F7	3CPX800A7	4CX1600U	4X150A/7034
8560AS	3CX4500F3/YU108	4CPX800A	4CX3500A	5CX1500A
3CX300A1	3CX6000A7/YU148	4CX250B/7203	4CX5000A	5CX1500B
3CX400A7	3CX10000A3	4CX250BC/8957	4CX5000R	YC130/9019
	3CX10000A7	4CX250BM

When you select the Part Number a new browser window will open with the Application Note,
which you can print yourself for free.
The price listed is for a printed copy from us.

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
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	No Charge
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.

PRICE AND AVAILABILITY SUBJECT TO CHANGE WITHOUT NOTICE

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