Universal FLL VFO stabilizer EL-34
Universal FLL VFO stabilizer EL-34
Universal FLL VFO stabilizer EL-34
TOP

Universal FLL VFO stabilizer EL-34

Product No.:
ZUB020-14
ca. 3-4 days ca. 3-4 days (abroad may vary)
HS-Code:
8541.9000
from 48.65 CHF

incl. 8.1% tax excl. Shipping costs

Add to wish list
Ask about product
Description

Universal FLL-VFO Stabilizer EL-34 (kit or assembled)

The EL-34 module has been developed for all radios with a free-running VFO,
and fits most radios such as Heathkit SB-104A, HW-101 or YAESU FT-101 etc.

With this additional circuit, the frequency stability of the VFO can be made crystal stable.

The kit is easy to assemble as it does not require SMD components.
Good soldering skills are required to assemble the circuit board and install it in the transceiver.

Technical specifications:

  • Frequency: 2 – 20MHz Input level: >100mV
  • Power supply: 7 bis 20V / 30mA 
  • Dimensions: 60L) × 35(B) × 15(H) mm
Download

Bau- und Bedienungs- und Funktionsbeschreibung (ge)
Construction, operational and functional description (en)

EL-34 installation instructions and tips from our customers

Although we review all instructions before publication, we assume no liability for resulting loss or injury.

Manufacturer

 Modell

 Author

Heathkit

 SB-104A
V1.0a

 Randy Best, W7CPA

Yaesu

 FT-101EE
V1.0b

 Dave Bohlen, N0EDS

logo-eico.gif 

 EICO-753
V1.0b

 John Polonchak, W3AYS

 Logo DRAKE

 DRAKE TR-4
V1.0a
 DRAKE TR-7
V1.0a

 John Polonchak, W3AYS

Marinos Markomanolakis
SV9DRU / KI4GIN

 logo-ten-tec

Corsair II
V1.0a

 Marinos Markomanolakis
SV9DRU / KI4GIN

TS-830S
V1.0a		 Peter Bowey, VK5AAW
Customer reviews (3)
  • Joao Paulo Ribeiro, 10/28/2026
    Extremely reliable and simple to install. All my old transceivers have this EL34 installed and now all off them behaves line the modern ones, it means no frequency drift at all. The support given from Mr. Roland for any doubt are super. Thank you Roland and ELCON for your amazing solutions. Joao CT2HZF means no frequency drift at all. The support given from Mr. Roland for any doubt are super. Thank you Roland and ELCON for your amazing solutions. Joao CT2HZF
    go to post
  • Giancarlo Paolini, 09/05/2025
    Al momento l'ho da poco ordinata, e prima che arrivi ho controllato le istruzioni per il montaggio sul mio Yaesu ft101E, e ho trovato non chiaro alla voce modifica clar control 2.2 punto 8 di fare un collegamento di 15 mm con un resistore di 2 Wat , nella figura 11 si vede un normale cavetto con la guaina nera ,,non si capisce che cosa si riferisce la resistenza di 2 Wat . Non si capisce quanti ohm sia,? fatemi sapere grazie da Paolini voce modifica clar control 2.2 punto 8 di fare un collegamento di 15 mm con un resistore di 2 Wat , nella figura 11 si vede un normale cavetto con la guaina nera ,,non si capisce che cosa si riferisce la resistenza di 2 Wat . Non si capisce quanti ohm sia,? fatemi sapere grazie da Paolini
    go to post
  • Peter Bowey, 07/30/2025
    The EL-34 VFO Stabilizer works extremely well to stabilize the VFO drift in my TS-830S. Over a two hour test period, with the EL-34 installed; from cold start to warm, the worst case frequency drift was only ±2.8 HZ (I used a high-end Frequency Counter to plot this drift over time). Without the EL-34, I used to get about ±165 HZ from cold to warm. I purchased the kit form of the EL-34, which Roland was fast to dispatch to Australia. The kit was very easy to assemble. Roland was found to be very supportive of any questions in the process and with very prompt answers. Prior to the EL-34 I used to use a resistor based modification to keep the underside VFO warm and humid free during off time (across the power switch). The best I could get there was 100 HZ drift scenarios... This EL-34 is highly recommended. Peter, VK5AAW cold start to warm, the worst case frequency drift was only ±2.8 HZ (I used a high-end Frequency Counter to plot this drift over time). Without the EL-34, I used to get about ±165 HZ from cold to warm. I purchased the kit form of the EL-34, which Roland was fast to dispatch to Australia. The kit was very easy to assemble. Roland was found to be very supportive of any questions in the process and with very prompt answers. Prior to the EL-34 I used to use a resistor based modification to keep the underside VFO warm and humid free during off time (across the power switch). The best I could get there was 100 HZ drift scenarios... This EL-34 is highly recommended. Peter, VK5AAW
    go to post