New
Rm kl503hd 25 - 30 mhz mobile amplifier including pre-amplifier.
Click the image to enlarge

RM Amplifiers

RM KL503HD 25-30 MHz mobile amplifier, including pre-amplifier.

£0.00
(£0.00 exc. VAT)
£279.95
(£233.29 exc. VAT)
Fast uk delivery
Worldwide delivery
In Stock
Qty:


0 Reward points
Product code: KL 503 HD
Download a pdf document for RM KL503HD 25-30 MHz mobile amplifier, including pre-amplifier.

Want to be notified when this product is back in stock? Complete the form below and we'll send you an email when it is.

Finance Available

Radioworld now offer finance through our partners Close Brothers.

Add the item to your basket in the normal way and at checkout choose to make payment via Finance. You’ll then be taken through to our partners Pay4Later to make your finance application.

Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£279.95
12 Months 14.9% APR
£27.99
£24.12
£317.49
£279.95
18 Months 14.9% APR
£27.99
£16.08
£317.49
£279.95
24 Months 14.9% APR
£27.99
£12.06
£317.49
£279.95
36 Months 14.9% APR
£27.99
£8.04
£317.49
£279.95
48 Months 14.9% APR
£27.99
£6.03
£317.49
£279.95
12 Months 19.5% APR
£27.99
£25.09
£329.08
£279.95
18 Months 19.5% APR
£27.99
£16.73
£329.08
£279.95
24 Months 19.5% APR
£27.99
£12.55
£329.08
£279.95
36 Months 19.5% APR
£27.99
£8.36
£329.08
£279.95
48 Months 19.5% APR
£27.99
£6.27
£329.08

Click here to recommend this product to a friend

Recommend a friend

Rm kl503hd 25 - 30 mhz mobile amplifier including pre-amplifier.

RM KL503HD 25-30 MHz mobile amplifier, including pre-amplifier.


The KL 503 HD is a 12V linear amplifier designed for the frequency range of 25 – 30 MHz. It operates with a drive power ranging from 1 to 35 watts in all modes. This amplifier is equipped with a six-position power selector controlled by a front panel knob. Additionally, it features an RX preamplifier with electronic switching, which can be conveniently activated using a switch located on the front panel.

With a power supply requirement of 13.8VDC +/- 1V and 40A, the KL 503 HD amplifier is capable of handling input currents up to 30A. It offers an output power of 300W and supports various modes including AM, FM, SSB, and CW. The input VSWR ranges from 1.1 to 1.5:1, ensuring efficient performance across different applications. To ensure safety, the amplifier is equipped with 3 fast 10A fuses (5x20mm) and has compact dimensions of L 300 W 190 H 67 mm, weighing 2.050 Kg.

All orders placed on this website will not be subject to VAT for customers residing in the European Union or the rest of the world. However, it is important to mention that VAT will still be applicable based on the rates set by your country upon delivery.

Our Price Match Promise means that if you find any of our Equipment at a lower advertised price elsewhere, we will match the price for you, subject to the below.

  • The product is identical to ours in brand, colour, size and model number.
  • The price must be the advertised price clearly on the competitor's online site.
  • The item must be in stock and available for immediate purchase (rather than available to order), with the authorised stockist able to complete delivery within 2-3 days.

Please fill out the form below. The details will be used to help us with your price promise request.

Your Details

Competitor Product

Weblink showing other retailers product at a reduced price, in stock and ready for dispatch

Product Details