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The link posted at the beginning of this thread is from a review by Bob's CB. Bob uncovered, and correctly identified the source of this problem (the problem is often referred to as "filter blow-by" - when the IF signal present at the IF filter input can couple around the IF filter - a portion of the IF passband is not filtered by the IF filter, resulting in poor IF selectivity. Circuit layout usually being the most common culprit)

It is interesting to note that Bob's CB performs this modification at no extra charge for anyone purchasing a new radio from his shop.

I agree, it would interesting to see a before and after comparison. Ranger states they cannot duplicate the problem on other units, but Bob had 2 out-of-the-box that exhibited this problem.

If this is a problem with this series of radios, then this really shouldn't be called a "mod" but should have resulted in a factory ECN. It IS possible that a board revision occurred either before or after Bob's review, and therefore not all radios will suffer from this issue.

It's a simple test to check a new, "unmodified" radio for this defect, and if present, should probably be corrected by the dealer prior to the sale, rather than at the time of sale for an additional charge.

Ejpi=-1

<blockquote data-quote="ejeuler" data-source="post: 430502" data-attributes="member: 26571">The link posted at the beginning of this thread is from a review by Bob&#039;s CB.&nbsp; Bob uncovered, and correctly identified the source of this problem (the problem is often referred to as &quot;filter blow-by&quot; -&nbsp; when the IF signal present at the IF filter input can couple around the IF filter - a portion of the IF passband is not filtered by the IF filter, resulting in poor IF selectivity. Circuit layout usually being the most common culprit)It is interesting to note that Bob&#039;s CB performs this modification at no extra charge for anyone purchasing a new radio from his shop.I agree, it would interesting to see a before and after comparison.&nbsp; Ranger states they cannot duplicate the problem on other units, but Bob had 2 out-of-the-box that exhibited this problem.&nbsp; If this is a problem with this series of radios, then this really shouldn&#039;t be called a &quot;mod&quot; but should have resulted in a factory ECN.&nbsp; It IS possible that a board revision occurred either before or after Bob&#039;s review, and therefore not all radios will suffer from this issue.It&#039;s a simple test to check a new, &quot;unmodified&quot; radio for this defect, and if present, should probably be corrected by the dealer prior to the sale, rather than at the time of sale for an additional charge.Ejpi=-1</blockquote>

[QUOTE="ejeuler, post: 430502, member: 26571"] The link posted at the beginning of this thread is from a review by Bob's CB. Bob uncovered, and correctly identified the source of this problem (the problem is often referred to as "filter blow-by" - when the IF signal present at the IF filter input can couple around the IF filter - a portion of the IF passband is not filtered by the IF filter, resulting in poor IF selectivity. Circuit layout usually being the most common culprit) It is interesting to note that Bob's CB performs this modification at no extra charge for anyone purchasing a new radio from his shop. I agree, it would interesting to see a before and after comparison. Ranger states they cannot duplicate the problem on other units, but Bob had 2 out-of-the-box that exhibited this problem. If this is a problem with this series of radios, then this really shouldn't be called a "mod" but should have resulted in a factory ECN. It IS possible that a board revision occurred either before or after Bob's review, and therefore not all radios will suffer from this issue. It's a simple test to check a new, "unmodified" radio for this defect, and if present, should probably be corrected by the dealer prior to the sale, rather than at the time of sale for an additional charge. Ejpi=-1 [/QUOTE]

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