- #1020 CPS OSCULATOR KEYER GENERATOR#
- #1020 CPS OSCULATOR KEYER PORTABLE#
- #1020 CPS OSCULATOR KEYER CODE#
- #1020 CPS OSCULATOR KEYER SERIES#
Memories: 4, approximately 110 characters each, non-volatile Keying style: Iambic with self completing characters Pre-assembled cables available - see below. The XT-4 is designed to work with modern solid state rigs with positive keying.
Great for Field Day and other multi-operator activities! The paddle reverse function lets you reverse the dit and dah keys without Paddle or a memory button instantly brings it back to normal operation. Minutes of inactivity in case you forget to turn it off.
The power save functionĪutomatically puts the XT-4 into an even more power stingy mode after 30 The XT-4 is designed for long battery life. Programming is simple! Just press the record and message buttons and start sending! Between contests program in QSO information like your name, QTH, and rig information. Program them with your CQ, call sign, and contest exchanges. The memory locations are non-volatile, saving your programmed information even when the power is removed. The CW speed range is 8-45 WPM.Įach of the 4 memories can hold approximately 110 Morse characters. The XT-4 is fully iambic with self-completing characters. Its clean design will also look great in your shack.
#1020 CPS OSCULATOR KEYER PORTABLE#
The small size and weight makes it perfect for Field Day, DXpeditions, County Hunting mobile operations, VHF rover and portable or vacation operations. The XT-4 is a battery powered CW memory keyer.
#1020 CPS OSCULATOR KEYER GENERATOR#
If the output transformer was not loaded on key-up, I would have added a 50 or 100 ohm resistor across the transformer secondary to provide a constant minimal load.Ī Hewlett-Packard HP-200AB audio generator was the previous item on the bench.Unified Microsystems: W9XT Contest Card DVK Digital Voice Keyer, CW Memory Keyer and more for ham radio operators! That provides a proper load on the output transformer at all times.
#1020 CPS OSCULATOR KEYER SERIES#
Like the later and safer CPS, the key is simply in series with the speaker to send code.Īs noted, the volume control on this early CPS model is actually a fader-style low-ohms potentiometer on the speaker side. I then added a jumper wire between the speaker and the key terminals which allows the key terminals to continue to be used as intended but only to key the speaker side of the output transformer. I removed all the components and wires to the key side of the terminal strip, connecting those components together under the chassis but not to either key terminal. However, in the interest of safety, I advocate making modifications, especially if they are reversible. The original unsafe circuit may have allowed for easier conversion to a transmitter monitor. The second CPS just needed contact cleaner applied to its controls. After that treatment, the oscillator worked as expected. I had to open that control to apply contact cleaner directly inside to solve the problem. The volume control which is a simple low ohms speaker fader control, was intermittent. The problem was solved by application of contact cleaner and working the switch. As can be seen here, the key terminals on the lower right are directly connected to B+. If you decide to use this early CPS version, I recommend rewiring it to match the later Ameco or at the very least, taping over the key terminals on the back and adding a warning.īefore modifications. The later Ameco CPS at this link is a much safer Ameco that keys the secondary side of the output transformer rather than the primary with its B+. Using them as originally wired will place 140 volts between the key and any grounded object such as any modern 3 wire appliance, computer, or radio.
#1020 CPS OSCULATOR KEYER CODE#
These early Ameco CPS code practice oscillators have the same problem as the Bud Codemaster model CPO-128A, putting 140 volts of B+ on the key and the terminal strip to which the key is connected. Because of the silk-screening, I could not readily repaint it.Īt a more recent hamfest, I found this one in excellent cosmetic condition. I originally only had this example which is in rough cosmetic condition, typical of a 50+ year old piece that has seen lots of use. The tubes are a 35W4 rectifier and a 50C5 oscillator/ audio out. As noted in the catalog ad below, it was sold either with or without the tubes.
This early model CPS was available either as a kit or completely built and tested. Early (1957) Ameco Code Practice Oscillator Early (1957) Ameco Code Practice OscillatorĪmeco produced several code practice oscillators, including this older version mentioned in Popular Electronics in June 1957.