TECHNICAL MATERIAL CORPORATION PL-172 Tmc Amplifier Spare PAL-1K

( Brand: Technical Material Corporation ), ( Model: PAL-1K ), ( Part Type: Amplifier ), ( Amplifier Class: Ab ), ( Country/region Of Manufacture: United States ), ( Output Power: 1000 W ), ( Band: Hf ), ( Supported Modes: Am )

Review TECHNICAL MATERIAL CORPORATION Tmc Amplifier Spare

The Pal-1K Technical Material TMC Amplifier PL-172 Spare is a high-quality audio amplifier designed for professional use. This amplifier is part of the Pal-1K series, known for its reliability and superior sound quality.

The PL-172 spare amplifier is a mono channel amplifier, capable of delivering a significant power output of 1000 watts at 4 ohms, making it ideal for powering large speakers or multiple smaller ones. It features a Class D topology, which ensures efficient power conversion and reduced heat output.

The amplifier's input section includes XLR and RCA connections, offering flexibility in terms of source equipment. It also comes with a high-pass filter and a variable low-pass filter, allowing for precise tuning of the frequency response to best suit your specific speakers.

The amplifier's construction is robust, featuring a tough aluminum chassis and heat sink, ensuring long-term reliability under heavy use. It also features protective measures such as over-temperature, over-current, and short-circuit protection, ensuring the safety of both the amplifier and connected equipment.

The PL-172 spare amplifier is a versatile and powerful addition to any professional audio setup. Whether you're a DJ, a live sound engineer, or a studio producer, this amplifier is capable of delivering the clean, powerful sound you need to make your audio stand out.

1. Compatibility: This spare part is specifically designed for the Pal-1K TMC Amplifier, ensuring a perfect fit and smooth operation.

2. Quality: The PL-172 is a high-quality spare part, manufactured by a reputable company, ensuring durability and reliability.

3. Availability: Having a spare part on hand can save you time and money in case of a failure, as you won't have to wait for a replacement or pay for emergency repairs.

1. Cost: Spare parts can be expensive, especially for high-end equipment like the Pal-1K TMC Amplifier.

2. Storage: If you don't need the spare part right away, you'll have to store it properly to avoid damage, which can take up space and require additional costs.

3. Obsolescence: Technology can change quickly, and spare parts for older equipment may become obsolete, making it difficult to find replacements in the future.

The Pal-1K TMC Amplifier PL-172 spare part can be a valuable investment for owners of the Pal-1K TMC Amplifier. It ensures compatibility, quality, and availability, which can save you time and money in case of a failure. However, the high cost and potential for obsolescence are important considerations to keep in mind. Ultimately, whether or not to purchase the spare part depends on your specific needs and budget.

If you frequently use the Pal-1K TMC Amplifier and can afford the cost, purchasing the PL-172 spare part can provide peace of mind and save you time and money in the long run. However, if you don't use the amplifier frequently or are on a tight budget, you may want to consider other options, such as paying for emergency repairs or using a rental service. It's always a good idea to do your research and compare prices and options before making a decision.

Details:

If plate current is low, the screen high and touchy, tends to peg or breaker trips, amplifier probably loaded too lightly. That is, a fairly wide range of input powers can result for fixed output power 1 kw, and plate efficiency is therefore variable. A compromise setting is usually required, and its best to favor minimum screen current, even if plate current slightly off the dip.

As you know, in dab full carrier am, at 100 sine wave modulation, the pep output is four times un modulated power, so must not exceed 250w.

Tuning the amplifier correctly is a matter of obtaining its rated 1 kw output and inter mod levels with best compromise between plate current, screen drive level. This amplifier operates from 2 MHz 32 divided into 9-band segments. 5x the un modulated carrier power.

Under 1 kw pep two-tone conditions, the 3rd order inter mod products should be at least 35 db below either tone. At 7 mc and below, it may require as little 10 MW, but 28 mc, more like 100 MW. In addition, plate efficiency is highly dependent on the modulated signals peak average power ratio.

And, theres significant variation from amplifier. This unit was in regular use at the arr headquarters until they modernized.

For example, with a two-tone signal at 1 kw pep, the plate efficiency will drop to only around 35, and exact value depend lot on drive loading conditions. So the question arises: what is correct combination of RF drive and plate loading. Power gain PAL-1K varies greatly with frequency, predicting required isn't straightforward. This unit is very clean and front panel has a beautiful, rich, glossy finish with minor flaws see photos. Under single tone conditions, the amplifier will produce 1 kw average power.

But it should never exceed 600 ma max 1800w plate dc input. Note: this is a tube-type electronic device with potentially dangerous voltage present on internal components. Under single tone conditions, you should obtain 1 kw output with plate current of around ma, and screen not to exceed 40 ma.

So, in sine wave modulated dab full-carrier am operation, the PAL-1K is now considered to be rated deliver 1 kw pep, but only about 375w average. Obviously, the amplifier cannot operate at 500w carrier power output, and still be modulated 100 without exceeding its 1kw pep output limit.

The single tone case is only one in which pep and average power are equal peak to ratio 1:1. So, tmc designed the exciter to produce at least 100 MW its rated distortion value. If you can't make rated power with similar plate and screen currents, be sure the driver section gain is sufficient. Plate and screen current should dip pretty much concurrently with a restive load, but they may not exactly together, particularly if the load is significantly reactive.

Both top and bottom covers are there in good condition see photos. When any modulated signal is applied, the ratio of peak envelope power to average increases greater than 1:1. Slide tilt rack-mount included see photos. The included PL-172 tube was providing full output until rack disassembled and stored.

First, be sure your exciter is capable of at least 100 MW. Use caution or utilize the services of a qualified technician when making repairs and adjustments. The knobs are also in very nice condition see photos. But usually, low emission tubes don't show the kind of high screen current you are apparently getting.

An extra PL-172 is included see photo. This amplifier section requires an external power supply. Amplifier unit second rack unit from top w 2-meters Technical discussion: source - internet the PAL-1K in SVT-1k is designed to produce a maximum output power of 1 kw, pep or average. Technical Material corporation PAL-1K amplifier section SVT-1k w PL-172 tube - here is a beautifully constructed from the legendary transmitter.

In order to stay within the rated distortion limits of amplifier, neither these conditions may be exceeded, whichever is reached first.

specifications hamamateuradio:

• brand: Technical Material Corporation
• model: Pal-1k
• part type: Amplifier
• amplifier class: Ab
• country/region of manufacture: United States
• output power: 1000 W
• band: Hf
• supported modes: Am

Shipping hamamateuradio:

• type: Calculated
• handling: 2 days

Ratings:

1. well packed, fast shipping, nice tuner, easy transaction, thanks! 06-03-18
2. The radio in excellent condition was very well packed. First class seller 07-21-18
3. speaker better than I expected well packed no problems at all. 06-08-18
4. Wonderful transaction, great packing, fast ship, fantastic radio thank you 07-16-18
5. As described, very fast shipping, Thank You! 06-11-18

Offer hamamateuradio:

• quantity: 1
• Sold: 0
• best offer: true
• bids: 0
• Started: July 21, 2018, 9:35 pm

General hamamateuradio:

• in stock: Yes
• condition: Used
• consumer electronics > radio communication electronics > ham amateur radio communication

Payments hamamateuradio:

• PayPal

Seller hamamateuradio:

• city: Huntington Station, New York
• zipcode: 11746

Returns hamamateuradio:

• policy: no returns

Technical Material Corporation PAL-1K Is Similar To:

• Cv-591a-urr Tmc Technical Materiel Ssb (44% similar) This is a relatively rare unit. From a ham estate. Tmc Technical materiel CV-591A RR Sb converter for R-390 GPR-90 etc. Untested, missing covers, unused for years, note oxidation on chassis...(October 14th, 2017)
• R-5007 An-frr-502 Tmc Technical Material Corp Ffr Hf Navy Receiver (50% similar) Unit is all original and includes the knobs. This also has the fairly rare tmc tone demodulate type AMD-1 installed on back of chassis. There is no plug in unit included or available at least from me. Also known as the R-5007 receiver. A very nice tmc type FDR beautifully constructed to military ...(August 3rd, 2018)
• Rak-4 Technical Material Corporation Tmc (72.5% similar) So it will not be cheap to ship no the radios are included and nothing pictured in background is either. This thing is heavy duty. Few fellow old time hams told me this cabinet was used to house 2 R-390S. Up for your consideration is a Technical Material Corporation RAK-4. Have some ham gear your ...(December 30th, 2017)
• Sbe-3 Technical Materials Corporation Tmc (69.9% similar) Technical Materials Corporation built legendary radio equipment. I will include my microphone adapter swan-type 1/4 stereo plug and a copy of the user service manual on CD PDF. Experimenters could transmit in am stereo and a host of other unique possibilities. The power supply is not included. The ...(December 7th, 2017)
• Technical Materiel Corporation Tmc Spu-2 Cb Ham Transmitter Audio Processor Unit (60.6% similar) The mating Hubble twist-lock ac input power connector is included, which can be seen installed in the rear of unit. Tmc model SPU-2 serial no. The original tmc service and installation manual for this unit is available on the internet. 34102 audio processing unit. I acquired this SPU-2 many years ...(May 1st, 2024)
• Alpha Pa-78 Operating And Technical Manual For The Eto 78 Linear Amplifier 76 76a 374 (49% similar) GSR veers 1706 gs 9.9 1706 nice and clean manual. Operating and Technical manual for the Eton alpha 78 linear amplifier 76 76A 374: this listing is for an original alpha manual...(February 15th, 2025)
• Technical Material Corp Gsb-1 Tmc Ssb Radio Adapter (54.9% similar) Item looks to be in very good original condition although I have no way test. This is for a tmc GSB-1 the GPR-90 receiver. GSR veers 1710 gs 9.9.1 1710 this is for a tmc GSB-1 the GPR-90 receiver...(April 8th, 2025)
• Technical Material Corp Gpr90rx Tmc Radio Receiver (58.9% similar) All knobs and dials turn perfectly. GSR veers 1710 gs 9.9.1 1710 this is for a clean GPR90RX radio with no cabinet. I was told by previous owner it is in good working condition but have not verified. This is for a clean GPR90RX radio with no cabinet...(April 10th, 2025)
• Tmc Technical Materiel Corp Ffr-3 Communication Receiver Ffrd-5a Tuning Drawer 2-4mhz (50% similar) In very good cosmetic condition but has no top cover. Sold strictly as-is/as-shown. Please see photos for personal cosmetic evaluation and specifics. Untested - sold in unknown condition. Up for sale is a tmc Technical materiel FFR-3 communication receiver with FFRD-5A tuning drawer 2-4MHZ...(March 27th, 2026)
• Tmc Technical Materiel Corporation Ky 45a Ky 45a Frt 5 U.s Navy Frequency Shift Keyer Cold War Rtty Module Clean (48% similar) Most units were destroyed during decommissioning, making surviving examples exceptionally scarce. Condition: clean front panel all knobs and switches present analog lamp meter intact navy bureau of ships data plates readable light cosmetic wear consistent with age no internal testing performed sold ...(May 7th, 2026)