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Performance Upgrades for the AOR AR7030/AR7030 Plus

Kiwa offers the following performance upgrades for the AR7030 and the AR7030 Plus.

Audio Upgrade
This modification is for those who want the absolute best audio from the receiver. We replace all audio coupling capacitors that may degrade the audio quality. We also replace the speaker wire with a silver plated type. The end result is improved audio clarity above and beyond the excellent audio as it comes stock. This upgrade will improve the definition of consanants which is important for intelligibility.

For more information regarding Kiwa Audio Upgrades - please see Kiwa Audio Upgrades - A Brief History


Audio Upgrade (Kiwa installation-price includes parts) $45.00
Audio Upgrade kit (complete installation instructions included) $18.00
Shipping and Handling within North America $3.00

Input Filter Performance Upgrade
The AR7030 has excellent immunity to signal overload. Early receivers before serial number 101000 had a problem where the IP3-Third Order Intercept figure decreased from a high +30 dBm or greater to +10 to +12 dBm as one tunes closer to the MW BCB. This situation was due to the components in the input filter. Basically they were not capable of handling high input signals often encountered when one is near a MW transmitter site. Kiwa offers a modification to the input filters to restore the IP3 to typically +33 dBm at 1.9 MHz. This modification will greatly enhance its signal overload immunity to strong MW BCB signals. Please note that this modification will only benefit those receivers before SR 101000 and it is only available for receivers shipped to Kiwa for modification. It is not available as a kit. Typical improvements are as follows:

SR 100147
IP3 at 1.9 MHz before filter modifications +11.25 dBm
IP3 at 1.9 MHz after filter modifications +33 dBm

SR 100306
IP3 at 1.9 MHz before filter modifications +11.50 dBm
IP3 after filter modifications +33 dBm

SR 100177
IP3 at 1.9 MHz before filter modifications +10.25 dBm
IP3 at 1.9 MHz after filter modifications +31.5 dBm

SR100097
IP3 at 1.9 MHz before filter modifications +12 dBm
IP3 at 1.9 MHz after filter modifications +36 dBm

SR 100343
IP3 at 1.9 MHz before filter modifications +12 dBm
IP3 at 1.9 MHz after filter modifications +36 dBm

SR 100350
IP3 at 1.9 MHz before filter modifications +10 dBm
IP3 at 1.9 MHz after filter modifications +33 dBm

Input Filter Performance Upgrade $70.00 (price includes required components)


Sync Detector Alignment

Kiwa also offers alignment of the sync detector locking range.
Price $35.00

Sync Detector Temperature Stabilization
Kiwa offers installation of several temperature stabilization components (thermistors) to stabilize the Sync Detector operation over an extended temperature range. This is similar to the recommended upgrade from AOR. The Sync Detector alignment is included.
Sync Detector Temperature Stabilization $40.00

FET Replacement
The FETs in some early sets were known to fail. AOR has since remedied the problem. Kiwa offers the same solution as now installed in current sets. If your receiver suddenly fails taking the input fuse, there's a very good chance that the FETs have failed. Kiwa repairs consists of FET replacements with the required modifications. It also involves adjustment of the bias voltage for best possible IP2 or Second Order Intercept performance (F1 +F2). As best as we can tell, the factory installed FET modifications were initiated somewhere just below SR 100200.
FET Repair Price (includes components) $60.00

AR 7030 Technical Measurements

Kiwa measurements of the AR7030 receiver.

Kiwa Electronics

503 7th. Ave. N.E.
Kasson, MN 55944 USA
507.634.6134 phone/fax
kiwa@wolfenet.com


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