Audio Levels Very Low - Normal?


Matt Brinks
 

I recently purchased a used IC-7000 that did not come with a Mic.  I bought a no-name one on Amazon and it had very low audio levels, I can hardly get the ALC to budge unless I drop plosives into the mic.  Thinking it was just a dogy mic I bought a genuine Icom HM-151 off of eBay and it seems to have the same issue.  It helps if I turn the mic gain up to 100% of course but that doesn't seem to be the right way to use this rig.

My question is - is this normal behavior for this radio or did I get a broken rig?  Appreciate any knowledge and guidance this group can provide.


Rick Barron
 

I run min with 5db Compression mic gain around 30%


On Tue., Aug. 2, 2022, 5:22 p.m. Matt Brinks, <mbrinkho@...> wrote:
I recently purchased a used IC-7000 that did not come with a Mic.  I bought a no-name one on Amazon and it had very low audio levels, I can hardly get the ALC to budge unless I drop plosives into the mic.  Thinking it was just a dogy mic I bought a genuine Icom HM-151 off of eBay and it seems to have the same issue.  It helps if I turn the mic gain up to 100% of course but that doesn't seem to be the right way to use this rig.

My question is - is this normal behavior for this radio or did I get a broken rig?  Appreciate any knowledge and guidance this group can provide.


 

I don't know what mike you are using, but Icom, especially the older ones, need a high output to function correctly.
Most are electret amplified and have + voltage on the mike lead to provide the operating voltage.
Yaesu and Kenwood have a different arrangement where the + voltage is not on the mike line and the power is coupled to the mike amplifier in another way.
You might want to try a full reset to see if that helps.
Have you tried both mike jacks? Rear and face panel?


 

Does it have low audio on FM and AM? Have you listened to it? How much power are you putting out on SSB?
ALC might not tell the whole story about audio.
Try a reset in case some settings have been buggered around.


hrd998cc
 

Agreed.  Consider checking voltage at the mic plug (carefully). Should be +8 volts. See attachment.
Russ


On Tuesday, August 2, 2022 at 03:13:32 PM PDT, J.D. Barron <jeter.d.barron@...> wrote:
I don't know what mike you are using, but Icom, especially the older ones, need a high output to function correctly.
Most are electret amplified and have + voltage on the mike lead to provide the operating voltage.
<snip>


Michel MNR
 

Bonjour,
Sur mon ic7000  dès années 2000 l'ALC a toujours été faible avec le micro HM-151. Je l'ai remplacé par un micro amplifié sm8 et sm20, gain réglé à 50%, ALC fonctionne bien. 73's F6FSC. 

Le mardi 2 août 2022 à 23:22:55 UTC+2, Matt Brinks <mbrinkho@...> a écrit :


J'ai récemment acheté un IC-7000 d'occasion sans micro. J'en ai acheté un sans nom sur Amazon et il avait des niveaux audio très bas, je peux difficilement faire bouger l'ALC à moins que je ne laisse tomber des plosives dans le micro. Pensant que c'était juste un micro pour chien, j'ai acheté un véritable Icom HM-151 sur eBay et il semble avoir le même problème. Cela aide si je tourne le gain du micro jusqu'à 100% bien sûr, mais cela ne semble pas être la bonne façon d'utiliser cette plate-forme.

Ma question est la suivante : est-ce un comportement normal pour cette radio ou ai-je eu une plate-forme cassée ? Appréciez toutes les connaissances et les conseils que ce groupe peut fournir.