# Antenna Surge Protector Prolech 5–2400 MHz, model 77-121

**URL:** https://aio.lv/en/product--prolech-77-121--12253255
**Data updated:** 2026-04-14 14:27 (EEST)
**Category:** SAT Antennas & Dishes
**Manufacturer:** Prolech
**Manufacturer code:** 77-121#
**EAN:** 5900804099116
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 5.78 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--prolech-77-121--12253255

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Antenna surge protector Prolech 77-121 for coaxial antenna systems operating from 5 to 2400 MHz. Provides lightning and transient overvoltage protection for antenna feeders, preserving receivers and tuners. Designed for inline installation in RF coax runs, suitable for TV, FM, DAB, DVB-T, satellite LNB protection and other wideband RF applications.

## Long description

The Prolech Antenna Surge Protector 5–2400 MHz (model 77-121) is an inline coaxial protector designed for wideband RF systems. It protects antenna feeders and connected equipment from lightning-induced and transient overvoltages while maintaining signal integrity across a broad frequency range. The device is intended for use in TV, FM, DAB, DVB-T and satellite LNB lines as well as other RF applications that require overvoltage protection for coaxial cables.
Advantages
The Prolech protector provides wideband protection covering 5–2400 MHz, enabling a single device to safeguard multiple types of services on the same feeder. Its inline design allows simple insertion into existing coax runs without complex reconfiguration. The unit is engineered to divert surge energy away from sensitive receivers and tuners, preserving downstream equipment and minimizing downtime. Construction and RF path are optimized to maintain low insertion loss and good return loss across the specified band.
Suitable for
 Protecting terrestrial TV (DVB-T/T2) antenna lines
 FM and DAB radio antenna feeders
 Satellite LNB protection on coax runs (wideband)
 Wideband RF distribution systems and test setups
 Residential and small commercial antenna installations
When it may not be suitable
This surge protector is intended for coaxial antenna systems operating within 5–2400 MHz. It is not suitable for protection of DC power lines, Ethernet/network cabling, or other non-coaxial signal paths. For systems that require certified protection levels for high-energy lightning direct strikes or where specific lightning protection standards must be met, more comprehensive grounding and external lightning protection measures may be required in addition to this inline device.
Key specifications
 Frequency range: 5–2400 MHz
 Application: coaxial antenna feeders for TV, FM, DAB, DVB-T, satellite LNB and wideband RF
 Installation type: inline coaxial insertion in RF feed line
 Function: transient and lightning-induced overvoltage diversion to protect receivers and tuners
 RF performance focus: low insertion loss and preserved signal integrity across specified band
How to use
Install the Prolech surge protector inline on the coaxial feeder between the antenna (or LNB) and the receiver/tuner. Ensure connectors are properly tightened to maintain good RF contact and weatherproof any outdoor connections according to local practice. The protector should be mounted with consideration for grounding: connect the device’s outer conductor or dedicated grounding point to a suitable earth ground if the unit design provides a grounding terminal or path. Verify signal levels after installation to confirm minimal insertion loss and normal reception of services.
What to consider before purchase
 Confirm the antenna system operates within the 5–2400 MHz frequency range.
 Ensure coax connector types and mechanical form factor match your existing feeder and installation space.
 Assess grounding arrangements at the installation site and whether additional external lightning protection is needed.
 Recognize that the device protects coaxial RF lines and is not a substitute for protection on other cabling types or for direct lightning strike mitigation.
Usage recommendations
For best results, install the surge protector as close as practical to the entry point of the coax into the building or near the equipment it protects, and ensure proper earthing of the protector and mast. Periodically inspect outdoor connections for corrosion and re-tighten connectors if signal degradation is observed.

## FAQ

### How much does the Prolech antenna surge protector 77-121 5–2400 MHz cost, and is it available for purchase?

The price is 6.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 96 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Prolech products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Prolech service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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