CK-8045ABM Curtis keyer chip, through-hole 28 pin.
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MFJ Enterprises

CK-8045ABM Curtis keyer chip, through-hole 28 pin.

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£40.96
(£34.13 exc. VAT)
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Product code: CK-8045ABM
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£40.96
12 Months 14.9% APR
£4.10
£3.53
£46.45
£40.96
18 Months 14.9% APR
£4.10
£2.35
£46.45
£40.96
24 Months 14.9% APR
£4.10
£1.76
£46.45
£40.96
36 Months 14.9% APR
£4.10
£1.18
£46.45
£40.96
48 Months 14.9% APR
£4.10
£0.88
£46.45
£40.96
12 Months 19.5% APR
£4.10
£3.67
£48.14
£40.96
18 Months 19.5% APR
£4.10
£2.45
£48.14
£40.96
24 Months 19.5% APR
£4.10
£1.84
£48.14
£40.96
36 Months 19.5% APR
£4.10
£1.22
£48.14
£40.96
48 Months 19.5% APR
£4.10
£0.92
£48.14

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CK-8045ABM Curtis keyer chip, through-hole 28 pin.

CK-8045ABM Curtis keyer chip, through-hole 28 pin.


The Curtis 8045ABM keyer chip is a significant upgrade from its predecessor, offering enhanced features without additional cost. Some notable features include an 89-character built-in memory, expandable non-volatile memory, and a true sine wave sidetone with smooth rise/fall times for a pleasant sound experience. Users can enjoy type A or B iambic keying, dot-dash memory, adjustable weight, tone, speed, and automatic or semi-auto mode, all packed into a 28-pin package.

Regarding specifications, the Curtis 8045ABM operates within a supply voltage range of 4 Vdc minimum to 6 Vdc maximum (5 Vdc recommended). The operating current varies depending on the sidetone and keying arrangement. Users can expect a speed range of approximately 5 to 65 words per minute, with the option for A or B iambic operation in automatic or semi-automatic mode. Weight control allows for adjustments, and the standard dot-dash-space ratio is set at 1:3:1.

Furthermore, the keyer chip features an internal sidetone generator utilizing an external low-pass filter, producing tones ranging from 300 to 1200 Hz. It comes with a built-in 85-character volatile message memory or the option for a more significant 507-character external non-volatile memory. Key debouncing is managed through internal logic, and the chip is housed in a 28-pin SDIP package, with a SOIC package also available for versatility.

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