The front end helicals need to be retuned for below 450 MHz receive. Something like a 10MHz spread if you tune for flat top response as Kenwood suggests in the manual (see the R-B archived TK890(H) service manual. For just about 442- 450 MHz repeater receive frequency, tune the helicals for peak response on the repeat receive frequency for best sensitivity.
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John
On 04/09/2025 5:27 PM EDT Mike Besemer - WM4B via groups.io <mwbesemer@...> wrote:
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Hmmmm… sound more like an alignment than a ‘tweak’.?
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Mike
WM4B
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On Wed, Apr 9, 2025, 14:53 Hudson, John@CalOES via <john.hudson=[email protected]> wrote:
In what way does the TK-890’s need tweaking??
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TK-890's aren't bad, but some need slight tweaking
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I have a Harris XG-75M that does 440-512 stock. Got it off eBay for about $175. Excellent radio with lots of features.?
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