Masters Communications Enclosed VHF and UHF Preamps

Custom Products from Masters Communications

EP-Series Enclosed RF Preamplifiers for repeater application.
$125.00 built, tested, tuned - any available connector choice - shipping extra.
$14.50 USPS Priority Insured Shipping in the US.
Shipping on foreign orders are quoted by destination, type and desired type and speed of delivery.

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Masters Communications EP-Series Preamps - Standard Features:
These standard features are included in all EP-Series Preamp Products.

Low Noise ~ 2dB noise figure.
100% totally shielded aluminum box - properly machined for rugged / stable opertion.
12VDC operation at low current draw (10-15V acceptable - about 10mA).
P1dB = +4 dBm.
Available with BNC, UHF, or N Female Connectors (or a unique combination of any two - - can eliminate adapters)
Moderate Gain - Less chance of receiver overload.
These preamps are NOT available as unassembled project kits - comes ready to install.
Power connection is made on the outside via DC Feedthru and ground lug (soldering preferred).
Siamese Black/Red power wire is available - just ask - small fee may apply.
$125.00 assembled, tested, & tuned - any connector option (BNC, UHF, N).
Built to order and professionally tuned on a HP 8753ES Vector Network Analyzer.
Great input match so your duplexer notch tuning is not pulled out of whack.
Comes with performance graphs showing gain and input return loss (match) on your receive frequency.
Email Kevin to get one built for your repeater.

Individual Features and Model Comparison:

Click on a model number for more information and ordering via email link.

Feature or Specification:

Frequency Range 135-160 MHz 219-225 MHz 420-470 MHz

Application Ham or Commercial Ham Ham, Commercial or GMRS

Gain in dB (nominal +/- 1dB) 11 dB 12 dB 13 dB

Noise Figure in dB 2 dB 2 dB 2.5 dB

Input Return Loss 20 dB 20 dB 18 dB

Output Return Loss >20 dB >20 dB >10 dB

Overload Point -8 dBm -9 dBm -10 dBm

P1dB +4 dBm +4 dBm +4 dBm

Bandwidth in MHz. (-3dB) 25 25 25

DC Power Requirement 12VDC @ 10mA 12VDC @ 10mA 12VDC @ 10mA

Available RF Connectors
(any combination of two) BNC Female
UHF (SO239) Female
Type N Female BNC Female
UHF (SO239) Female
Type N Female BNC Female
UHF (SO239) Female
Type N Female

Feature or Specification:
Frequency Range	135-160 MHz	219-225 MHz	420-470 MHz
Application	Ham or Commercial	Ham	Ham, Commercial or GMRS
Gain in dB (nominal +/- 1dB)	11 dB	12 dB	13 dB
Noise Figure in dB	2 dB	2 dB	2.5 dB
Input Return Loss	20 dB	20 dB	18 dB
Output Return Loss	>20 dB	>20 dB	>10 dB
Overload Point	-8 dBm	-9 dBm	-10 dBm
P1dB	+4 dBm	+4 dBm	+4 dBm
Bandwidth in MHz. (-3dB)	25	25	25
DC Power Requirement	12VDC @ 10mA	12VDC @ 10mA	12VDC @ 10mA
Available RF Connectors (any combination of two)	BNC Female UHF (SO239) Female Type N Female	BNC Female UHF (SO239) Female Type N Female	BNC Female UHF (SO239) Female Type N Female

More Information:
Email Kevin Custer for ordering information and/or support of these exciting products.

Products of Masters Communications, all rights reserved.
Specifications may change without notice.
Images are property of Kevin Custer - W3KKC.
Board layout by Kevin Custer - W3KKC.
HTML August 1, 2022, W3KKC All Rights Reserved!