# FM radio gain control cuts out the left channel **URL:** \ **Category:** Archive\ **Tags:** tracker, rma, sample-recorder, resolved\ **Created:** [November 13, 2024, 2:20pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808 "2024-11-13T14:20:19Z")\ **Posts on this page:** 14\ **Page:** 2
**Author:** ![Patrick](https://backstage.polyend.com/user_avatar/backstage.polyend.com/patrick/32/4898_2.png) [@Patrick](https://backstage.polyend.com/u/Patrick)\ **Post date:** [December 3, 2024, 10:54pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/24 "2024-12-03T22:54:41Z")
And here i am again… Sure, how many digits do you need? As i stated before, probably there’s a manufacture issue with some boards, its just that not many users do tests. And i cannot test further, my device is currently RMA under warranty, god knows how long this takes. But i can provide the part of the serial. ---
**Author:** ![Sandroid](https://backstage.polyend.com/user_avatar/backstage.polyend.com/sandroid/32/172_2.png) [@Sandroid](https://backstage.polyend.com/u/Sandroid)\ **Post date:** [December 3, 2024, 10:56pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/25 "2024-12-03T22:56:39Z")
I just need the initial (three?) letters (don’t need the numbers). Just trying to establish a pattern. ---
**Author:** ![Patrick](https://backstage.polyend.com/user_avatar/backstage.polyend.com/patrick/32/4898_2.png) [@Patrick](https://backstage.polyend.com/u/Patrick)\ **Post date:** [December 3, 2024, 10:58pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/26 "2024-12-03T22:58:15Z")
The initial 3 letters are PTK\*\*\* ---
**Author:** ![paul-8189](https://backstage.polyend.com/letter_avatar_proxy/v4/letter/p/34f0e0/32.png) [@paul-8189](https://backstage.polyend.com/u/paul-8189)\ **Post date:** [December 4, 2024, 5:31pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/27 "2024-12-04T17:31:33Z")
Hi @Sandroid Mine is PTI… Video [here](https://vimeo.com/1036068519?share=copy) Thanks for looking into this. Should I submit a formal bug report? Thanks ---
**Author:** ![Patrick](https://backstage.polyend.com/user_avatar/backstage.polyend.com/patrick/32/4898_2.png) [@Patrick](https://backstage.polyend.com/u/Patrick)\ **Post date:** [December 4, 2024, 7:50pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/28 "2024-12-04T19:50:33Z")
@paul-8189 This is the bug report already, though we can assume its hardware related. You can set the line in in the config menu to left channel only, then you should hear no sound when turning up the gain. Thank you for your submit ---
**Author:** ![Sandroid](https://backstage.polyend.com/user_avatar/backstage.polyend.com/sandroid/32/172_2.png) [@Sandroid](https://backstage.polyend.com/u/Sandroid)\ **Post date:** [December 4, 2024, 8:11pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/30 "2024-12-04T20:11:50Z")
@Patrick is right. This is already the bug report, so you are good. 😊 I’ve forwarded the findings to Polyend in hopes to find out if it is in fact a hardware revision specific issue or software related after all. Once i know more, i’ll make sure to update you guys. ---
**Author:** ![Sandroid](https://backstage.polyend.com/user_avatar/backstage.polyend.com/sandroid/32/172_2.png) [@Sandroid](https://backstage.polyend.com/u/Sandroid)\ **Post date:** [December 10, 2024, 5:06pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/32 "2024-12-10T17:06:39Z")
Hey @here, as i sadly expected, it turns out to be a hardware issue. @Patrick’s device made its way to Polyend and it looks like a faulty radio module. @paul-8189, if you want to get yours sorted out, please fill out the RMA: [RMA Application Form • Polyend](https://polyend.com/rma-application-form/) and Polyend will take care of this for you as well. Feel free to contact me directly if anything is unclear. ---
**Author:** ![Patrick](https://backstage.polyend.com/user_avatar/backstage.polyend.com/patrick/32/4898_2.png) [@Patrick](https://backstage.polyend.com/u/Patrick)\ **Post date:** [December 10, 2024, 6:04pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/36 "2024-12-10T18:04:53Z")
Ah good it has arrived. Glad to help😊 ---
**Author:** ![paul-8189](https://backstage.polyend.com/letter_avatar_proxy/v4/letter/p/34f0e0/32.png) [@paul-8189](https://backstage.polyend.com/u/paul-8189)\ **Post date:** [December 11, 2024, 8:03pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/37 "2024-12-11T20:03:56Z")
Thank you. I submitted the form. ---
**Author:** ![Patrick](https://backstage.polyend.com/user_avatar/backstage.polyend.com/patrick/32/4898_2.png) [@Patrick](https://backstage.polyend.com/u/Patrick)\ **Post date:** [December 16, 2024, 7:14pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/38 "2024-12-16T19:14:24Z")
Hello again, especially Polyend Team. I received my tracker after RMA. What did you repair? It has exactly the same issue. I am quite unsure whats going on here, did you even open up the device? Can I have a statement, please. ---
**Author:** ![Patrick](https://backstage.polyend.com/user_avatar/backstage.polyend.com/patrick/32/4898_2.png) [@Patrick](https://backstage.polyend.com/u/Patrick)\ **Post date:** [December 16, 2024, 7:26pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/39 "2024-12-16T19:26:56Z")
---
**Author:** ![jigs](https://backstage.polyend.com/letter_avatar_proxy/v4/letter/j/ebca7d/32.png) [@jigs](https://backstage.polyend.com/u/jigs)\ **Post date:** [December 17, 2024, 5:03pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/40 "2024-12-17T17:03:18Z")
Sorry for detracting from your own issue, but i’ve just got a shipping label and an invoice from Polyend after submitting an RMA. Not sure what the invoice is for as the unit won’t switch on and should be covered by warranty. Is it something to attach to the return parcel somehow (along with the shipping label) as the instructions aren’t super clear and I want to post this tonight? Instructions say… ‘You will find the documents necessary for shipping your instrument below. Please print what’s attached, affix it to the parcel, and drop the package at the nearest collection spot, or schedule a pickup.’ ---
**Author:** ![borsuk](https://backstage.polyend.com/user_avatar/backstage.polyend.com/borsuk/32/582_2.png) [@borsuk](https://backstage.polyend.com/u/borsuk)\ **Post date:** [December 19, 2024, 3:13pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/43 "2024-12-19T15:13:35Z")
@jigs Please take a look at the private message 🙂 @Patrick We have done some investigating with the service team. They are adamant that they exchanged the radio module in this unit. Thankfully, Thomann already contacted us about this case and we are waiting for your Tracker. We will make sure it’s fixed for good 🙂 ---
**Author:** ![Sandroid](https://backstage.polyend.com/user_avatar/backstage.polyend.com/sandroid/32/172_2.png) [@Sandroid](https://backstage.polyend.com/u/Sandroid)\ **Post date:** [December 24, 2024, 5:10pm UTC](https://backstage.polyend.com/t/fm-radio-gain-control-cuts-out-the-left-channel/15808/44 "2024-12-24T17:10:15Z")
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