Modifications for the Kenwood TS-450 Modifications for the Kenwood TS-450 KAM-PLUS Problems!! With TS-450 & 850 Hello All,, A common problem when using a KAM-Plus multimode with the Kenwood TS-850 or TS-450 occurs when the KAM-Plus is coupled to the Accessory-2 socket on the back of the transceiver, producing noticable distortion of the transmitted audio when using the microphone in SSB mode. The problem is easy to cure by disconnecting the Accessory-2 plug from the back of the tranceiver, but this meant moving the transceiver around every time one wished to operate on SSB. The problem is caused by the input sensitivity of the rear Accessory-2 socket being set to high, so that it picks up very low level noise from the KAM-Plus and associated computer wiring, this mixes with the microphone signal, to produce the distortion. The cure is to reduce the input sensitivity of the radio, thus reducing the chance of distortion, also it goes without saying that the output from the KAM-Plus must be increased to compensate for this. With both the TS-450 and TS-850, adjusting the input sensitivity is straight forward and the transceiver manuals show you the appropriate control and its location. This is in both cases VR18 to be found on the main board of the radio,(refer to manual) in practice I found that it was best to adjust this control fully counterclockwise.
View and Download Kenwood TS-450S instruction manual online. HF transceiver all mode multi bander. TS-450S Transceiver pdf manual download. More Kenwood Ts-450 Manual images. Kenwood - TS-450S & TS-690S User Read more about kenwood, manual and radiomanual.info. Find great deals on eBay for kenwood ts-450s manual. Shop with confidence.
Then we need to adjust the output from the KAM-Plus by varying potentiometer R28 and setting removable link (K9), this link is factory set on one post only, (in the open position)!! This should be connected shorting the two posts, thus putting the KAM-Plus into the high output position, and then potentiometer R-28 is adjusted to give full power out from your HF radio with very little ALC deflection, when the MIC gain is in the normal operating position. Elektroinstallation Symbols Pdf Printer. Then I am sure you will find that your problem is over, you can now simply change from digital modes to SSB.
Remember if you have your Beacon activated to turn it OFF or it could cause a few comments when operating SSB. General coverage transmisson modification for the TS-450 and TS-690 • Remove all screws of top and bottom case. • Remove two screws of front panel (left and right top sie),and loosen two srews of front panel (left and right bottom side). E2esoft Vcam 5.1 Crack.
Download Elyana Lustado. • Remove all screws of digital unit ( X46-312X-XX ). • Cut the chip diode D27 (RL73) on digital unit rear side. [ [ [ __ __ [ [ _ Bat. _ [ [ [ [ [ [ __ __ [ [ [ [ [ [ [_ _[ [ [ [ [ [ [ [ [ [ [ [ [ ->I- D27 (RL73) CUT THIS [ [ [ __ __ [ _ ->I- D26 [ [ [ ->I- D25 [ [ ->I- D24 [ [ ->I- D23 [ [ ->I- D22 [ [ ->I- D21 [ [ ->I- D20 [ ________________________________________________________ DIGITAL JNIT (X46-312X-XX) Component side view Best 73 Eric St-Pascal Kam. VE2MEL TS-450S Intermittent receive fixed After making a careful mobile installation, WB0BQV found his TS450S to have intermittent receive.
He removed the screw that was going through the coax in his car and made a second installation in his truck. More intermittent.
With some careful diagnosis he found that moving the coax connector up and down caused the change in signal. With the radio opened up, I found that moving the coax connector was breaking the contact between the wire from the center conductor and the board (W1 in the schematic).